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 #if defined(__FreeBSD__)
9 #include <linux/cache.h>
10 #endif
11
12 #include "mvm.h"
13 #include "sta.h"
14 #include "rs.h"
15
16 /*
17 * New version of ADD_STA_sta command added new fields at the end of the
18 * structure, so sending the size of the relevant API's structure is enough to
19 * support both API versions.
20 */
iwl_mvm_add_sta_cmd_size(struct iwl_mvm * mvm)21 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
22 {
23 if (iwl_mvm_has_new_rx_api(mvm) ||
24 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
25 return sizeof(struct iwl_mvm_add_sta_cmd);
26 else
27 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
28 }
29
iwl_mvm_find_free_sta_id(struct iwl_mvm * mvm,enum nl80211_iftype iftype)30 int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype)
31 {
32 int sta_id;
33 u32 reserved_ids = 0;
34
35 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
36 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
37
38 lockdep_assert_held(&mvm->mutex);
39
40 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
41 if (iftype != NL80211_IFTYPE_STATION)
42 reserved_ids = BIT(0);
43
44 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
45 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
46 if (BIT(sta_id) & reserved_ids)
47 continue;
48
49 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
50 lockdep_is_held(&mvm->mutex)))
51 return sta_id;
52 }
53 return IWL_MVM_INVALID_STA;
54 }
55
56 /* 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)57 u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta,
58 struct ieee80211_bss_conf *link_conf,
59 u32 *_agg_size)
60 {
61 u32 agg_size = 0, mpdu_dens = 0;
62
63 if (WARN_ON(!link_sta))
64 return 0;
65
66 /* Note that we always use only legacy & highest supported PPDUs, so
67 * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating
68 * the maximum A-MPDU size of various PPDU types in different bands,
69 * we only need to worry about the highest supported PPDU type here.
70 */
71
72 if (link_sta->ht_cap.ht_supported) {
73 agg_size = link_sta->ht_cap.ampdu_factor;
74 mpdu_dens = link_sta->ht_cap.ampdu_density;
75 }
76
77 if (link_conf->chanreq.oper.chan->band == NL80211_BAND_6GHZ) {
78 /* overwrite HT values on 6 GHz */
79 mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa,
80 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
81 agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa,
82 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
83 } else if (link_sta->vht_cap.vht_supported) {
84 /* if VHT supported overwrite HT value */
85 agg_size = u32_get_bits(link_sta->vht_cap.cap,
86 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
87 }
88
89 /* D6.0 10.12.2 A-MPDU length limit rules
90 * A STA indicates the maximum length of the A-MPDU preEOF padding
91 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
92 * Exponent field in its HT Capabilities, VHT Capabilities,
93 * and HE 6 GHz Band Capabilities elements (if present) and the
94 * Maximum AMPDU Length Exponent Extension field in its HE
95 * Capabilities element
96 */
97 if (link_sta->he_cap.has_he)
98 agg_size +=
99 u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3],
100 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
101
102 if (link_sta->eht_cap.has_eht)
103 agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1],
104 IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK);
105
106 /* Limit to max A-MPDU supported by FW */
107 agg_size = min_t(u32, agg_size,
108 STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT);
109
110 *_agg_size = agg_size;
111 return mpdu_dens;
112 }
113
iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta * sta)114 u8 iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta *sta)
115 {
116 u8 uapsd_acs = 0;
117
118 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
119 uapsd_acs |= BIT(AC_BK);
120 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
121 uapsd_acs |= BIT(AC_BE);
122 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
123 uapsd_acs |= BIT(AC_VI);
124 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
125 uapsd_acs |= BIT(AC_VO);
126
127 return uapsd_acs | uapsd_acs << 4;
128 }
129
130 /* 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)131 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
132 bool update, unsigned int flags)
133 {
134 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
135 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
136 .sta_id = mvm_sta->deflink.sta_id,
137 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
138 .add_modify = update ? 1 : 0,
139 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
140 STA_FLG_MIMO_EN_MSK |
141 STA_FLG_RTS_MIMO_PROT),
142 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
143 };
144 int ret;
145 u32 status;
146 u32 agg_size = 0, mpdu_dens = 0;
147
148 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
149 add_sta_cmd.station_type = mvm_sta->sta_type;
150
151 if (!update || (flags & STA_MODIFY_QUEUES)) {
152 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
153
154 if (!iwl_mvm_has_new_tx_api(mvm)) {
155 add_sta_cmd.tfd_queue_msk =
156 cpu_to_le32(mvm_sta->tfd_queue_msk);
157
158 if (flags & STA_MODIFY_QUEUES)
159 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
160 } else {
161 WARN_ON(flags & STA_MODIFY_QUEUES);
162 }
163 }
164
165 switch (sta->deflink.bandwidth) {
166 case IEEE80211_STA_RX_BW_320:
167 case IEEE80211_STA_RX_BW_160:
168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
169 fallthrough;
170 case IEEE80211_STA_RX_BW_80:
171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
172 fallthrough;
173 case IEEE80211_STA_RX_BW_40:
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
175 fallthrough;
176 case IEEE80211_STA_RX_BW_20:
177 if (sta->deflink.ht_cap.ht_supported)
178 add_sta_cmd.station_flags |=
179 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
180 break;
181 }
182
183 switch (sta->deflink.rx_nss) {
184 case 1:
185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
186 break;
187 case 2:
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
189 break;
190 case 3 ... 8:
191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
192 break;
193 }
194
195 switch (sta->deflink.smps_mode) {
196 case IEEE80211_SMPS_AUTOMATIC:
197 case IEEE80211_SMPS_NUM_MODES:
198 WARN_ON(1);
199 break;
200 case IEEE80211_SMPS_STATIC:
201 /* override NSS */
202 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
203 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
204 break;
205 case IEEE80211_SMPS_DYNAMIC:
206 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
207 break;
208 case IEEE80211_SMPS_OFF:
209 /* nothing */
210 break;
211 }
212
213 if (sta->deflink.ht_cap.ht_supported ||
214 mvm_sta->vif->bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ)
215 add_sta_cmd.station_flags_msk |=
216 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
217 STA_FLG_AGG_MPDU_DENS_MSK);
218
219 mpdu_dens = iwl_mvm_get_sta_ampdu_dens(&sta->deflink,
220 &mvm_sta->vif->bss_conf,
221 &agg_size);
222 add_sta_cmd.station_flags |=
223 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
224 add_sta_cmd.station_flags |=
225 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
226
227 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
228 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
229
230 if (sta->wme) {
231 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
232 add_sta_cmd.uapsd_acs = iwl_mvm_get_sta_uapsd_acs(sta);
233 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
234 }
235
236 status = ADD_STA_SUCCESS;
237 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
238 iwl_mvm_add_sta_cmd_size(mvm),
239 &add_sta_cmd, &status);
240 if (ret)
241 return ret;
242
243 switch (status & IWL_ADD_STA_STATUS_MASK) {
244 case ADD_STA_SUCCESS:
245 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
246 break;
247 default:
248 ret = -EIO;
249 IWL_ERR(mvm, "ADD_STA failed\n");
250 break;
251 }
252
253 return ret;
254 }
255
iwl_mvm_rx_agg_session_expired(struct timer_list * t)256 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
257 {
258 struct iwl_mvm_baid_data *data =
259 from_timer(data, t, session_timer);
260 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
261 struct iwl_mvm_baid_data *ba_data;
262 struct ieee80211_sta *sta;
263 struct iwl_mvm_sta *mvm_sta;
264 unsigned long timeout;
265 unsigned int sta_id;
266
267 rcu_read_lock();
268
269 ba_data = rcu_dereference(*rcu_ptr);
270
271 if (WARN_ON(!ba_data))
272 goto unlock;
273
274 if (!ba_data->timeout)
275 goto unlock;
276
277 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
278 if (time_is_after_jiffies(timeout)) {
279 mod_timer(&ba_data->session_timer, timeout);
280 goto unlock;
281 }
282
283 /* Timer expired */
284 sta_id = ffs(ba_data->sta_mask) - 1; /* don't care which one */
285 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[sta_id]);
286
287 /*
288 * sta should be valid unless the following happens:
289 * The firmware asserts which triggers a reconfig flow, but
290 * the reconfig fails before we set the pointer to sta into
291 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
292 * A-MDPU and hence the timer continues to run. Then, the
293 * timer expires and sta is NULL.
294 */
295 if (IS_ERR_OR_NULL(sta))
296 goto unlock;
297
298 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
299 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
300 sta->addr, ba_data->tid);
301 unlock:
302 rcu_read_unlock();
303 }
304
305 /* 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)306 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
307 unsigned long disable_agg_tids,
308 bool remove_queue)
309 {
310 struct iwl_mvm_add_sta_cmd cmd = {};
311 struct ieee80211_sta *sta;
312 struct iwl_mvm_sta *mvmsta;
313 u32 status;
314 u8 sta_id;
315
316 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
317 return -EINVAL;
318
319 sta_id = mvm->queue_info[queue].ra_sta_id;
320
321 rcu_read_lock();
322
323 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
324
325 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
326 rcu_read_unlock();
327 return -EINVAL;
328 }
329
330 mvmsta = iwl_mvm_sta_from_mac80211(sta);
331
332 mvmsta->tid_disable_agg |= disable_agg_tids;
333
334 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
335 cmd.sta_id = mvmsta->deflink.sta_id;
336 cmd.add_modify = STA_MODE_MODIFY;
337 cmd.modify_mask = STA_MODIFY_QUEUES;
338 if (disable_agg_tids)
339 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
340 if (remove_queue)
341 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
342 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
343 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
344
345 rcu_read_unlock();
346
347 /* Notify FW of queue removal from the STA queues */
348 status = ADD_STA_SUCCESS;
349 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
350 iwl_mvm_add_sta_cmd_size(mvm),
351 &cmd, &status);
352 }
353
iwl_mvm_disable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int sta_id,u16 * queueptr,u8 tid)354 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
355 int sta_id, u16 *queueptr, u8 tid)
356 {
357 int queue = *queueptr;
358 struct iwl_scd_txq_cfg_cmd cmd = {
359 .scd_queue = queue,
360 .action = SCD_CFG_DISABLE_QUEUE,
361 };
362 int ret;
363
364 lockdep_assert_held(&mvm->mutex);
365
366 if (iwl_mvm_has_new_tx_api(mvm)) {
367 if (mvm->sta_remove_requires_queue_remove) {
368 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP,
369 SCD_QUEUE_CONFIG_CMD);
370 struct iwl_scd_queue_cfg_cmd remove_cmd = {
371 .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE),
372 .u.remove.sta_mask = cpu_to_le32(BIT(sta_id)),
373 };
374
375 if (tid == IWL_MAX_TID_COUNT)
376 tid = IWL_MGMT_TID;
377
378 remove_cmd.u.remove.tid = cpu_to_le32(tid);
379
380 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0,
381 sizeof(remove_cmd),
382 &remove_cmd);
383 } else {
384 ret = 0;
385 }
386
387 iwl_trans_txq_free(mvm->trans, queue);
388 *queueptr = IWL_MVM_INVALID_QUEUE;
389
390 return ret;
391 }
392
393 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
394 return 0;
395
396 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
397
398 cmd.action = mvm->queue_info[queue].tid_bitmap ?
399 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
400 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
401 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
402
403 IWL_DEBUG_TX_QUEUES(mvm,
404 "Disabling TXQ #%d tids=0x%x\n",
405 queue,
406 mvm->queue_info[queue].tid_bitmap);
407
408 /* If the queue is still enabled - nothing left to do in this func */
409 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
410 return 0;
411
412 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
413 cmd.tid = mvm->queue_info[queue].txq_tid;
414
415 /* Make sure queue info is correct even though we overwrite it */
416 WARN(mvm->queue_info[queue].tid_bitmap,
417 "TXQ #%d info out-of-sync - tids=0x%x\n",
418 queue, mvm->queue_info[queue].tid_bitmap);
419
420 /* If we are here - the queue is freed and we can zero out these vals */
421 mvm->queue_info[queue].tid_bitmap = 0;
422
423 if (sta) {
424 struct iwl_mvm_txq *mvmtxq =
425 iwl_mvm_txq_from_tid(sta, tid);
426
427 spin_lock_bh(&mvm->add_stream_lock);
428 list_del_init(&mvmtxq->list);
429 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
430 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
431 spin_unlock_bh(&mvm->add_stream_lock);
432 }
433
434 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
435 mvm->queue_info[queue].reserved = false;
436
437 iwl_trans_txq_disable(mvm->trans, queue, false);
438 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0,
439 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
440
441 if (ret)
442 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
443 queue, ret);
444 return ret;
445 }
446
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)447 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
448 {
449 struct ieee80211_sta *sta;
450 struct iwl_mvm_sta *mvmsta;
451 unsigned long tid_bitmap;
452 unsigned long agg_tids = 0;
453 u8 sta_id;
454 int tid;
455
456 lockdep_assert_held(&mvm->mutex);
457
458 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
459 return -EINVAL;
460
461 sta_id = mvm->queue_info[queue].ra_sta_id;
462 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
463
464 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
465 lockdep_is_held(&mvm->mutex));
466
467 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
468 return -EINVAL;
469
470 mvmsta = iwl_mvm_sta_from_mac80211(sta);
471
472 spin_lock_bh(&mvmsta->lock);
473 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
474 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
475 agg_tids |= BIT(tid);
476 }
477 spin_unlock_bh(&mvmsta->lock);
478
479 return agg_tids;
480 }
481
482 /*
483 * Remove a queue from a station's resources.
484 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
485 * doesn't disable the queue
486 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)487 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
488 {
489 struct ieee80211_sta *sta;
490 struct iwl_mvm_sta *mvmsta;
491 unsigned long tid_bitmap;
492 unsigned long disable_agg_tids = 0;
493 u8 sta_id;
494 int tid;
495
496 lockdep_assert_held(&mvm->mutex);
497
498 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
499 return -EINVAL;
500
501 sta_id = mvm->queue_info[queue].ra_sta_id;
502 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
503
504 rcu_read_lock();
505
506 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
507
508 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
509 rcu_read_unlock();
510 return 0;
511 }
512
513 mvmsta = iwl_mvm_sta_from_mac80211(sta);
514
515 spin_lock_bh(&mvmsta->lock);
516 /* Unmap MAC queues and TIDs from this queue */
517 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
518 struct iwl_mvm_txq *mvmtxq =
519 iwl_mvm_txq_from_tid(sta, tid);
520
521 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
522 disable_agg_tids |= BIT(tid);
523 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
524
525 spin_lock_bh(&mvm->add_stream_lock);
526 list_del_init(&mvmtxq->list);
527 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
528 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
529 spin_unlock_bh(&mvm->add_stream_lock);
530 }
531
532 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
533 spin_unlock_bh(&mvmsta->lock);
534
535 rcu_read_unlock();
536
537 /*
538 * The TX path may have been using this TXQ_ID from the tid_data,
539 * so make sure it's no longer running so that we can safely reuse
540 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
541 * above, but nothing guarantees we've stopped using them. Thus,
542 * without this, we could get to iwl_mvm_disable_txq() and remove
543 * the queue while still sending frames to it.
544 */
545 synchronize_net();
546
547 return disable_agg_tids;
548 }
549
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,struct ieee80211_sta * old_sta,u8 new_sta_id)550 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
551 struct ieee80211_sta *old_sta,
552 u8 new_sta_id)
553 {
554 struct iwl_mvm_sta *mvmsta;
555 u8 sta_id, tid;
556 unsigned long disable_agg_tids = 0;
557 bool same_sta;
558 u16 queue_tmp = queue;
559 int ret;
560
561 lockdep_assert_held(&mvm->mutex);
562
563 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
564 return -EINVAL;
565
566 sta_id = mvm->queue_info[queue].ra_sta_id;
567 tid = mvm->queue_info[queue].txq_tid;
568
569 same_sta = sta_id == new_sta_id;
570
571 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
572 if (WARN_ON(!mvmsta))
573 return -EINVAL;
574
575 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
576 /* Disable the queue */
577 if (disable_agg_tids)
578 iwl_mvm_invalidate_sta_queue(mvm, queue,
579 disable_agg_tids, false);
580
581 ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid);
582 if (ret) {
583 IWL_ERR(mvm,
584 "Failed to free inactive queue %d (ret=%d)\n",
585 queue, ret);
586
587 return ret;
588 }
589
590 /* If TXQ is allocated to another STA, update removal in FW */
591 if (!same_sta)
592 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
593
594 return 0;
595 }
596
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)597 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
598 unsigned long tfd_queue_mask, u8 ac)
599 {
600 int queue = 0;
601 u8 ac_to_queue[IEEE80211_NUM_ACS];
602 int i;
603
604 /*
605 * This protects us against grabbing a queue that's being reconfigured
606 * by the inactivity checker.
607 */
608 lockdep_assert_held(&mvm->mutex);
609
610 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
611 return -EINVAL;
612
613 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
614
615 /* See what ACs the existing queues for this STA have */
616 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
617 /* Only DATA queues can be shared */
618 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
619 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
620 continue;
621
622 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
623 }
624
625 /*
626 * The queue to share is chosen only from DATA queues as follows (in
627 * descending priority):
628 * 1. An AC_BE queue
629 * 2. Same AC queue
630 * 3. Highest AC queue that is lower than new AC
631 * 4. Any existing AC (there always is at least 1 DATA queue)
632 */
633
634 /* Priority 1: An AC_BE queue */
635 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
636 queue = ac_to_queue[IEEE80211_AC_BE];
637 /* Priority 2: Same AC queue */
638 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
639 queue = ac_to_queue[ac];
640 /* Priority 3a: If new AC is VO and VI exists - use VI */
641 else if (ac == IEEE80211_AC_VO &&
642 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
643 queue = ac_to_queue[IEEE80211_AC_VI];
644 /* Priority 3b: No BE so only AC less than the new one is BK */
645 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
646 queue = ac_to_queue[IEEE80211_AC_BK];
647 /* Priority 4a: No BE nor BK - use VI if exists */
648 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
649 queue = ac_to_queue[IEEE80211_AC_VI];
650 /* Priority 4b: No BE, BK nor VI - use VO if exists */
651 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
652 queue = ac_to_queue[IEEE80211_AC_VO];
653
654 /* Make sure queue found (or not) is legal */
655 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
656 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
657 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
658 IWL_ERR(mvm, "No DATA queues available to share\n");
659 return -ENOSPC;
660 }
661
662 return queue;
663 }
664
665 /* 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)666 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo,
667 int sta_id, int tid, int frame_limit, u16 ssn)
668 {
669 struct iwl_scd_txq_cfg_cmd cmd = {
670 .scd_queue = queue,
671 .action = SCD_CFG_ENABLE_QUEUE,
672 .window = frame_limit,
673 .sta_id = sta_id,
674 .ssn = cpu_to_le16(ssn),
675 .tx_fifo = fifo,
676 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
677 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
678 .tid = tid,
679 };
680 int ret;
681
682 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
683 return -EINVAL;
684
685 if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
686 "Trying to reconfig unallocated queue %d\n", queue))
687 return -ENXIO;
688
689 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
690
691 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
692 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
693 queue, fifo, ret);
694
695 return ret;
696 }
697
698 /*
699 * If a given queue has a higher AC than the TID stream that is being compared
700 * to, the queue needs to be redirected to the lower AC. This function does that
701 * in such a case, otherwise - if no redirection required - it does nothing,
702 * unless the %force param is true.
703 */
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)704 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
705 int ac, int ssn, unsigned int wdg_timeout,
706 bool force, struct iwl_mvm_txq *txq)
707 {
708 struct iwl_scd_txq_cfg_cmd cmd = {
709 .scd_queue = queue,
710 .action = SCD_CFG_DISABLE_QUEUE,
711 };
712 bool shared_queue;
713 int ret;
714
715 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
716 return -EINVAL;
717
718 /*
719 * If the AC is lower than current one - FIFO needs to be redirected to
720 * the lowest one of the streams in the queue. Check if this is needed
721 * here.
722 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
723 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
724 * we need to check if the numerical value of X is LARGER than of Y.
725 */
726 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
727 IWL_DEBUG_TX_QUEUES(mvm,
728 "No redirection needed on TXQ #%d\n",
729 queue);
730 return 0;
731 }
732
733 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
734 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
735 cmd.tid = mvm->queue_info[queue].txq_tid;
736 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
737
738 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
739 queue, iwl_mvm_ac_to_tx_fifo[ac]);
740
741 /* Stop the queue and wait for it to empty */
742 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
743
744 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
745 if (ret) {
746 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
747 queue);
748 ret = -EIO;
749 goto out;
750 }
751
752 /* Before redirecting the queue we need to de-activate it */
753 iwl_trans_txq_disable(mvm->trans, queue, false);
754 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
755 if (ret)
756 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
757 ret);
758
759 /* Make sure the SCD wrptr is correctly set before reconfiguring */
760 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
761
762 /* Update the TID "owner" of the queue */
763 mvm->queue_info[queue].txq_tid = tid;
764
765 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
766
767 /* Redirect to lower AC */
768 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
769 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
770
771 /* Update AC marking of the queue */
772 mvm->queue_info[queue].mac80211_ac = ac;
773
774 /*
775 * Mark queue as shared in transport if shared
776 * Note this has to be done after queue enablement because enablement
777 * can also set this value, and there is no indication there to shared
778 * queues
779 */
780 if (shared_queue)
781 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
782
783 out:
784 /* Continue using the queue */
785 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
786
787 return ret;
788 }
789
iwl_mvm_find_free_queue(struct iwl_mvm * mvm,u8 sta_id,u8 minq,u8 maxq)790 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
791 u8 minq, u8 maxq)
792 {
793 int i;
794
795 lockdep_assert_held(&mvm->mutex);
796
797 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
798 "max queue %d >= num_of_queues (%d)", maxq,
799 mvm->trans->trans_cfg->base_params->num_of_queues))
800 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
801
802 /* This should not be hit with new TX path */
803 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
804 return -ENOSPC;
805
806 /* Start by looking for a free queue */
807 for (i = minq; i <= maxq; i++)
808 if (mvm->queue_info[i].tid_bitmap == 0 &&
809 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
810 return i;
811
812 return -ENOSPC;
813 }
814
iwl_mvm_get_queue_size(struct ieee80211_sta * sta)815 static int iwl_mvm_get_queue_size(struct ieee80211_sta *sta)
816 {
817 int max_size = IWL_DEFAULT_QUEUE_SIZE;
818 unsigned int link_id;
819
820 /* this queue isn't used for traffic (cab_queue) */
821 if (!sta)
822 return IWL_MGMT_QUEUE_SIZE;
823
824 rcu_read_lock();
825
826 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
827 struct ieee80211_link_sta *link =
828 rcu_dereference(sta->link[link_id]);
829
830 if (!link)
831 continue;
832
833 /* support for 512 ba size */
834 if (link->eht_cap.has_eht &&
835 max_size < IWL_DEFAULT_QUEUE_SIZE_EHT)
836 max_size = IWL_DEFAULT_QUEUE_SIZE_EHT;
837
838 /* support for 256 ba size */
839 if (link->he_cap.has_he &&
840 max_size < IWL_DEFAULT_QUEUE_SIZE_HE)
841 max_size = IWL_DEFAULT_QUEUE_SIZE_HE;
842 }
843
844 rcu_read_unlock();
845 return max_size;
846 }
847
iwl_mvm_tvqm_enable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 sta_id,u8 tid,unsigned int timeout)848 int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
849 struct ieee80211_sta *sta,
850 u8 sta_id, u8 tid, unsigned int timeout)
851 {
852 int queue, size;
853 u32 sta_mask = 0;
854
855 if (tid == IWL_MAX_TID_COUNT) {
856 tid = IWL_MGMT_TID;
857 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
858 mvm->trans->cfg->min_txq_size);
859 } else {
860 size = iwl_mvm_get_queue_size(sta);
861 }
862
863 if (sta) {
864 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
865 struct ieee80211_link_sta *link_sta;
866 unsigned int link_id;
867
868 rcu_read_lock();
869 for_each_sta_active_link(mvmsta->vif, sta, link_sta, link_id) {
870 struct iwl_mvm_link_sta *link =
871 rcu_dereference_protected(mvmsta->link[link_id],
872 lockdep_is_held(&mvm->mutex));
873
874 if (!link)
875 continue;
876
877 sta_mask |= BIT(link->sta_id);
878 }
879 rcu_read_unlock();
880 } else {
881 sta_mask |= BIT(sta_id);
882 }
883
884 if (!sta_mask)
885 return -EINVAL;
886
887 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask,
888 tid, size, timeout);
889
890 if (queue >= 0)
891 IWL_DEBUG_TX_QUEUES(mvm,
892 "Enabling TXQ #%d for sta mask 0x%x tid %d\n",
893 queue, sta_mask, tid);
894
895 return queue;
896 }
897
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)898 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
899 struct ieee80211_sta *sta, u8 ac,
900 int tid)
901 {
902 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
903 struct iwl_mvm_txq *mvmtxq =
904 iwl_mvm_txq_from_tid(sta, tid);
905 unsigned int wdg_timeout =
906 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
907 int queue = -1;
908
909 lockdep_assert_held(&mvm->mutex);
910
911 IWL_DEBUG_TX_QUEUES(mvm,
912 "Allocating queue for sta %d on tid %d\n",
913 mvmsta->deflink.sta_id, tid);
914 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
915 tid, wdg_timeout);
916 if (queue < 0)
917 return queue;
918
919 mvmtxq->txq_id = queue;
920 mvm->tvqm_info[queue].txq_tid = tid;
921 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id;
922
923 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
924
925 spin_lock_bh(&mvmsta->lock);
926 mvmsta->tid_data[tid].txq_id = queue;
927 spin_unlock_bh(&mvmsta->lock);
928
929 return 0;
930 }
931
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)932 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
933 struct ieee80211_sta *sta,
934 int queue, u8 sta_id, u8 tid)
935 {
936 bool enable_queue = true;
937
938 /* Make sure this TID isn't already enabled */
939 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
940 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
941 queue, tid);
942 return false;
943 }
944
945 /* Update mappings and refcounts */
946 if (mvm->queue_info[queue].tid_bitmap)
947 enable_queue = false;
948
949 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
950 mvm->queue_info[queue].ra_sta_id = sta_id;
951
952 if (enable_queue) {
953 if (tid != IWL_MAX_TID_COUNT)
954 mvm->queue_info[queue].mac80211_ac =
955 tid_to_mac80211_ac[tid];
956 else
957 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
958
959 mvm->queue_info[queue].txq_tid = tid;
960 }
961
962 if (sta) {
963 struct iwl_mvm_txq *mvmtxq =
964 iwl_mvm_txq_from_tid(sta, tid);
965
966 mvmtxq->txq_id = queue;
967 }
968
969 IWL_DEBUG_TX_QUEUES(mvm,
970 "Enabling TXQ #%d tids=0x%x\n",
971 queue, mvm->queue_info[queue].tid_bitmap);
972
973 return enable_queue;
974 }
975
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)976 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
977 int queue, u16 ssn,
978 const struct iwl_trans_txq_scd_cfg *cfg,
979 unsigned int wdg_timeout)
980 {
981 struct iwl_scd_txq_cfg_cmd cmd = {
982 .scd_queue = queue,
983 .action = SCD_CFG_ENABLE_QUEUE,
984 .window = cfg->frame_limit,
985 .sta_id = cfg->sta_id,
986 .ssn = cpu_to_le16(ssn),
987 .tx_fifo = cfg->fifo,
988 .aggregate = cfg->aggregate,
989 .tid = cfg->tid,
990 };
991 bool inc_ssn;
992
993 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
994 return false;
995
996 /* Send the enabling command if we need to */
997 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
998 return false;
999
1000 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
1001 NULL, wdg_timeout);
1002 if (inc_ssn)
1003 le16_add_cpu(&cmd.ssn, 1);
1004
1005 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
1006 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
1007
1008 return inc_ssn;
1009 }
1010
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)1011 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
1012 {
1013 struct iwl_scd_txq_cfg_cmd cmd = {
1014 .scd_queue = queue,
1015 .action = SCD_CFG_UPDATE_QUEUE_TID,
1016 };
1017 int tid;
1018 unsigned long tid_bitmap;
1019 int ret;
1020
1021 lockdep_assert_held(&mvm->mutex);
1022
1023 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1024 return;
1025
1026 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1027
1028 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
1029 return;
1030
1031 /* Find any TID for queue */
1032 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1033 cmd.tid = tid;
1034 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1035
1036 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
1037 if (ret) {
1038 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
1039 queue, ret);
1040 return;
1041 }
1042
1043 mvm->queue_info[queue].txq_tid = tid;
1044 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
1045 queue, tid);
1046 }
1047
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)1048 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1049 {
1050 struct ieee80211_sta *sta;
1051 struct iwl_mvm_sta *mvmsta;
1052 u8 sta_id;
1053 int tid = -1;
1054 unsigned long tid_bitmap;
1055 unsigned int wdg_timeout;
1056 int ssn;
1057 int ret = true;
1058
1059 /* queue sharing is disabled on new TX path */
1060 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1061 return;
1062
1063 lockdep_assert_held(&mvm->mutex);
1064
1065 sta_id = mvm->queue_info[queue].ra_sta_id;
1066 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1067
1068 /* Find TID for queue, and make sure it is the only one on the queue */
1069 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1070 if (tid_bitmap != BIT(tid)) {
1071 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1072 queue, tid_bitmap);
1073 return;
1074 }
1075
1076 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1077 tid);
1078
1079 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1080 lockdep_is_held(&mvm->mutex));
1081
1082 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1083 return;
1084
1085 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1086 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1087
1088 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1089
1090 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1091 tid_to_mac80211_ac[tid], ssn,
1092 wdg_timeout, true,
1093 iwl_mvm_txq_from_tid(sta, tid));
1094 if (ret) {
1095 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1096 return;
1097 }
1098
1099 /* If aggs should be turned back on - do it */
1100 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1101 struct iwl_mvm_add_sta_cmd cmd = {0};
1102
1103 mvmsta->tid_disable_agg &= ~BIT(tid);
1104
1105 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1106 cmd.sta_id = mvmsta->deflink.sta_id;
1107 cmd.add_modify = STA_MODE_MODIFY;
1108 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1109 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1110 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1111
1112 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1113 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1114 if (!ret) {
1115 IWL_DEBUG_TX_QUEUES(mvm,
1116 "TXQ #%d is now aggregated again\n",
1117 queue);
1118
1119 /* Mark queue intenally as aggregating again */
1120 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1121 }
1122 }
1123
1124 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1125 }
1126
1127 /*
1128 * Remove inactive TIDs of a given queue.
1129 * If all queue TIDs are inactive - mark the queue as inactive
1130 * If only some the queue TIDs are inactive - unmap them from the queue
1131 *
1132 * Returns %true if all TIDs were removed and the queue could be reused.
1133 */
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)1134 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1135 struct iwl_mvm_sta *mvmsta, int queue,
1136 unsigned long tid_bitmap,
1137 unsigned long *unshare_queues,
1138 unsigned long *changetid_queues)
1139 {
1140 unsigned int tid;
1141
1142 lockdep_assert_held(&mvmsta->lock);
1143 lockdep_assert_held(&mvm->mutex);
1144
1145 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1146 return false;
1147
1148 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1149 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1150 /* If some TFDs are still queued - don't mark TID as inactive */
1151 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1152 tid_bitmap &= ~BIT(tid);
1153
1154 /* Don't mark as inactive any TID that has an active BA */
1155 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1156 tid_bitmap &= ~BIT(tid);
1157 }
1158
1159 /* If all TIDs in the queue are inactive - return it can be reused */
1160 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1161 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1162 return true;
1163 }
1164
1165 /*
1166 * If we are here, this is a shared queue and not all TIDs timed-out.
1167 * Remove the ones that did.
1168 */
1169 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1170 u16 q_tid_bitmap;
1171
1172 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1173 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1174
1175 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1176
1177 /*
1178 * We need to take into account a situation in which a TXQ was
1179 * allocated to TID x, and then turned shared by adding TIDs y
1180 * and z. If TID x becomes inactive and is removed from the TXQ,
1181 * ownership must be given to one of the remaining TIDs.
1182 * This is mainly because if TID x continues - a new queue can't
1183 * be allocated for it as long as it is an owner of another TXQ.
1184 *
1185 * Mark this queue in the right bitmap, we'll send the command
1186 * to the firmware later.
1187 */
1188 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1189 set_bit(queue, changetid_queues);
1190
1191 IWL_DEBUG_TX_QUEUES(mvm,
1192 "Removing inactive TID %d from shared Q:%d\n",
1193 tid, queue);
1194 }
1195
1196 IWL_DEBUG_TX_QUEUES(mvm,
1197 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1198 mvm->queue_info[queue].tid_bitmap);
1199
1200 /*
1201 * There may be different TIDs with the same mac queues, so make
1202 * sure all TIDs have existing corresponding mac queues enabled
1203 */
1204 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1205
1206 /* If the queue is marked as shared - "unshare" it */
1207 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1208 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1209 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1210 queue);
1211 set_bit(queue, unshare_queues);
1212 }
1213
1214 return false;
1215 }
1216
1217 /*
1218 * Check for inactivity - this includes checking if any queue
1219 * can be unshared and finding one (and only one) that can be
1220 * reused.
1221 * This function is also invoked as a sort of clean-up task,
1222 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1223 *
1224 * Returns the queue number, or -ENOSPC.
1225 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1226 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1227 {
1228 unsigned long now = jiffies;
1229 unsigned long unshare_queues = 0;
1230 unsigned long changetid_queues = 0;
1231 int i, ret, free_queue = -ENOSPC;
1232 struct ieee80211_sta *queue_owner = NULL;
1233
1234 lockdep_assert_held(&mvm->mutex);
1235
1236 if (iwl_mvm_has_new_tx_api(mvm))
1237 return -ENOSPC;
1238
1239 rcu_read_lock();
1240
1241 /* we skip the CMD queue below by starting at 1 */
1242 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1243
1244 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1245 struct ieee80211_sta *sta;
1246 struct iwl_mvm_sta *mvmsta;
1247 u8 sta_id;
1248 int tid;
1249 unsigned long inactive_tid_bitmap = 0;
1250 unsigned long queue_tid_bitmap;
1251
1252 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1253 if (!queue_tid_bitmap)
1254 continue;
1255
1256 /* If TXQ isn't in active use anyway - nothing to do here... */
1257 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1258 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1259 continue;
1260
1261 /* Check to see if there are inactive TIDs on this queue */
1262 for_each_set_bit(tid, &queue_tid_bitmap,
1263 IWL_MAX_TID_COUNT + 1) {
1264 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1265 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1266 continue;
1267
1268 inactive_tid_bitmap |= BIT(tid);
1269 }
1270
1271 /* If all TIDs are active - finish check on this queue */
1272 if (!inactive_tid_bitmap)
1273 continue;
1274
1275 /*
1276 * If we are here - the queue hadn't been served recently and is
1277 * in use
1278 */
1279
1280 sta_id = mvm->queue_info[i].ra_sta_id;
1281 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1282
1283 /*
1284 * If the STA doesn't exist anymore, it isn't an error. It could
1285 * be that it was removed since getting the queues, and in this
1286 * case it should've inactivated its queues anyway.
1287 */
1288 if (IS_ERR_OR_NULL(sta))
1289 continue;
1290
1291 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1292
1293 spin_lock_bh(&mvmsta->lock);
1294 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1295 inactive_tid_bitmap,
1296 &unshare_queues,
1297 &changetid_queues);
1298 if (ret && free_queue < 0) {
1299 queue_owner = sta;
1300 free_queue = i;
1301 }
1302 /* only unlock sta lock - we still need the queue info lock */
1303 spin_unlock_bh(&mvmsta->lock);
1304 }
1305
1306
1307 /* Reconfigure queues requiring reconfiguation */
1308 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1309 iwl_mvm_unshare_queue(mvm, i);
1310 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1311 iwl_mvm_change_queue_tid(mvm, i);
1312
1313 rcu_read_unlock();
1314
1315 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1316 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1317 alloc_for_sta);
1318 if (ret)
1319 return ret;
1320 }
1321
1322 return free_queue;
1323 }
1324
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1325 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1326 struct ieee80211_sta *sta, u8 ac, int tid)
1327 {
1328 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1329 struct iwl_trans_txq_scd_cfg cfg = {
1330 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1331 .sta_id = mvmsta->deflink.sta_id,
1332 .tid = tid,
1333 .frame_limit = IWL_FRAME_LIMIT,
1334 };
1335 unsigned int wdg_timeout =
1336 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1337 int queue = -1;
1338 u16 queue_tmp;
1339 unsigned long disable_agg_tids = 0;
1340 enum iwl_mvm_agg_state queue_state;
1341 bool shared_queue = false, inc_ssn;
1342 int ssn;
1343 unsigned long tfd_queue_mask;
1344 int ret;
1345
1346 lockdep_assert_held(&mvm->mutex);
1347
1348 if (iwl_mvm_has_new_tx_api(mvm))
1349 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1350
1351 spin_lock_bh(&mvmsta->lock);
1352 tfd_queue_mask = mvmsta->tfd_queue_msk;
1353 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1354 spin_unlock_bh(&mvmsta->lock);
1355
1356 if (tid == IWL_MAX_TID_COUNT) {
1357 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1358 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1359 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1360 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1361 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1362 queue);
1363
1364 /* If no such queue is found, we'll use a DATA queue instead */
1365 }
1366
1367 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1368 (mvm->queue_info[mvmsta->reserved_queue].status ==
1369 IWL_MVM_QUEUE_RESERVED)) {
1370 queue = mvmsta->reserved_queue;
1371 mvm->queue_info[queue].reserved = true;
1372 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1373 }
1374
1375 if (queue < 0)
1376 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1377 IWL_MVM_DQA_MIN_DATA_QUEUE,
1378 IWL_MVM_DQA_MAX_DATA_QUEUE);
1379 if (queue < 0) {
1380 /* try harder - perhaps kill an inactive queue */
1381 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1382 }
1383
1384 /* No free queue - we'll have to share */
1385 if (queue <= 0) {
1386 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1387 if (queue > 0) {
1388 shared_queue = true;
1389 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1390 }
1391 }
1392
1393 /*
1394 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1395 * to make sure no one else takes it.
1396 * This will allow avoiding re-acquiring the lock at the end of the
1397 * configuration. On error we'll mark it back as free.
1398 */
1399 if (queue > 0 && !shared_queue)
1400 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1401
1402 /* This shouldn't happen - out of queues */
1403 if (WARN_ON(queue <= 0)) {
1404 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1405 tid, cfg.sta_id);
1406 return queue;
1407 }
1408
1409 /*
1410 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1411 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1412 * as aggregatable.
1413 * Mark all DATA queues as allowing to be aggregated at some point
1414 */
1415 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1416 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1417
1418 IWL_DEBUG_TX_QUEUES(mvm,
1419 "Allocating %squeue #%d to sta %d on tid %d\n",
1420 shared_queue ? "shared " : "", queue,
1421 mvmsta->deflink.sta_id, tid);
1422
1423 if (shared_queue) {
1424 /* Disable any open aggs on this queue */
1425 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1426
1427 if (disable_agg_tids) {
1428 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1429 queue);
1430 iwl_mvm_invalidate_sta_queue(mvm, queue,
1431 disable_agg_tids, false);
1432 }
1433 }
1434
1435 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1436
1437 /*
1438 * Mark queue as shared in transport if shared
1439 * Note this has to be done after queue enablement because enablement
1440 * can also set this value, and there is no indication there to shared
1441 * queues
1442 */
1443 if (shared_queue)
1444 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1445
1446 spin_lock_bh(&mvmsta->lock);
1447 /*
1448 * This looks racy, but it is not. We have only one packet for
1449 * this ra/tid in our Tx path since we stop the Qdisc when we
1450 * need to allocate a new TFD queue.
1451 */
1452 if (inc_ssn) {
1453 mvmsta->tid_data[tid].seq_number += 0x10;
1454 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1455 }
1456 mvmsta->tid_data[tid].txq_id = queue;
1457 mvmsta->tfd_queue_msk |= BIT(queue);
1458 queue_state = mvmsta->tid_data[tid].state;
1459
1460 if (mvmsta->reserved_queue == queue)
1461 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1462 spin_unlock_bh(&mvmsta->lock);
1463
1464 if (!shared_queue) {
1465 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1466 if (ret)
1467 goto out_err;
1468
1469 /* If we need to re-enable aggregations... */
1470 if (queue_state == IWL_AGG_ON) {
1471 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1472 if (ret)
1473 goto out_err;
1474 }
1475 } else {
1476 /* Redirect queue, if needed */
1477 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1478 wdg_timeout, false,
1479 iwl_mvm_txq_from_tid(sta, tid));
1480 if (ret)
1481 goto out_err;
1482 }
1483
1484 return 0;
1485
1486 out_err:
1487 queue_tmp = queue;
1488 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid);
1489
1490 return ret;
1491 }
1492
iwl_mvm_sta_ensure_queue(struct iwl_mvm * mvm,struct ieee80211_txq * txq)1493 int iwl_mvm_sta_ensure_queue(struct iwl_mvm *mvm,
1494 struct ieee80211_txq *txq)
1495 {
1496 struct iwl_mvm_txq *mvmtxq = iwl_mvm_txq_from_mac80211(txq);
1497 int ret = -EINVAL;
1498
1499 lockdep_assert_held(&mvm->mutex);
1500
1501 if (likely(test_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state)) ||
1502 !txq->sta) {
1503 return 0;
1504 }
1505
1506 if (!iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, txq->tid)) {
1507 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1508 ret = 0;
1509 }
1510
1511 local_bh_disable();
1512 spin_lock(&mvm->add_stream_lock);
1513 if (!list_empty(&mvmtxq->list))
1514 list_del_init(&mvmtxq->list);
1515 spin_unlock(&mvm->add_stream_lock);
1516 local_bh_enable();
1517
1518 return ret;
1519 }
1520
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1521 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1522 {
1523 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1524 add_stream_wk);
1525
1526 mutex_lock(&mvm->mutex);
1527
1528 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1529
1530 while (!list_empty(&mvm->add_stream_txqs)) {
1531 struct iwl_mvm_txq *mvmtxq;
1532 struct ieee80211_txq *txq;
1533 u8 tid;
1534
1535 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1536 struct iwl_mvm_txq, list);
1537
1538 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1539 drv_priv);
1540 tid = txq->tid;
1541 if (tid == IEEE80211_NUM_TIDS)
1542 tid = IWL_MAX_TID_COUNT;
1543
1544 /*
1545 * We can't really do much here, but if this fails we can't
1546 * transmit anyway - so just don't transmit the frame etc.
1547 * and let them back up ... we've tried our best to allocate
1548 * a queue in the function itself.
1549 */
1550 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1551 spin_lock_bh(&mvm->add_stream_lock);
1552 list_del_init(&mvmtxq->list);
1553 spin_unlock_bh(&mvm->add_stream_lock);
1554 continue;
1555 }
1556
1557 /* now we're ready, any remaining races/concurrency will be
1558 * handled in iwl_mvm_mac_itxq_xmit()
1559 */
1560 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1561
1562 local_bh_disable();
1563 spin_lock(&mvm->add_stream_lock);
1564 list_del_init(&mvmtxq->list);
1565 spin_unlock(&mvm->add_stream_lock);
1566
1567 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1568 local_bh_enable();
1569 }
1570
1571 mutex_unlock(&mvm->mutex);
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_MVM_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, false, false);
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_MVM_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_MVM_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_MVM_INVALID_STA);
1910 mvmvif->deflink.ap_sta_id = sta_id;
1911 } else {
1912 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_MVM_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 #if defined(__linux__)
1954 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1955 mvmsta->deflink.sta_id);
1956 #elif defined(__FreeBSD__)
1957 IWL_ERR(mvm, "Couldn't drain frames for staid %d, status %#x\n",
1958 mvmsta->deflink.sta_id, status);
1959 #endif
1960 break;
1961 }
1962
1963 return ret;
1964 }
1965
1966 /*
1967 * Remove a station from the FW table. Before sending the command to remove
1968 * the station validate that the station is indeed known to the driver (sanity
1969 * only).
1970 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1971 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1972 {
1973 struct ieee80211_sta *sta;
1974 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1975 .sta_id = sta_id,
1976 };
1977 int ret;
1978
1979 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1980 lockdep_is_held(&mvm->mutex));
1981
1982 /* Note: internal stations are marked as error values */
1983 if (!sta) {
1984 IWL_ERR(mvm, "Invalid station id\n");
1985 return -EINVAL;
1986 }
1987
1988 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1989 sizeof(rm_sta_cmd), &rm_sta_cmd);
1990 if (ret) {
1991 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1992 return ret;
1993 }
1994
1995 return 0;
1996 }
1997
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1998 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1999 struct ieee80211_vif *vif,
2000 struct ieee80211_sta *sta)
2001 {
2002 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2003 int i;
2004
2005 lockdep_assert_held(&mvm->mutex);
2006
2007 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2008 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
2009 continue;
2010
2011 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id,
2012 &mvm_sta->tid_data[i].txq_id, i);
2013 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
2014 }
2015
2016 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
2017 struct iwl_mvm_txq *mvmtxq =
2018 iwl_mvm_txq_from_mac80211(sta->txq[i]);
2019
2020 spin_lock_bh(&mvm->add_stream_lock);
2021 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
2022 list_del_init(&mvmtxq->list);
2023 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
2024 spin_unlock_bh(&mvm->add_stream_lock);
2025 }
2026 }
2027
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)2028 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
2029 struct iwl_mvm_sta *mvm_sta)
2030 {
2031 int i;
2032
2033 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2034 u16 txq_id;
2035 int ret;
2036
2037 spin_lock_bh(&mvm_sta->lock);
2038 txq_id = mvm_sta->tid_data[i].txq_id;
2039 spin_unlock_bh(&mvm_sta->lock);
2040
2041 if (txq_id == IWL_MVM_INVALID_QUEUE)
2042 continue;
2043
2044 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2045 if (ret)
2046 return ret;
2047 }
2048
2049 return 0;
2050 }
2051
2052 /* Execute the common part for both MLD and non-MLD modes.
2053 * Returns if we're done with removing the station, either
2054 * with error or success
2055 */
iwl_mvm_sta_del(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_link_sta * link_sta,int * ret)2056 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2057 struct ieee80211_sta *sta,
2058 struct ieee80211_link_sta *link_sta, int *ret)
2059 {
2060 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2061 struct iwl_mvm_vif_link_info *mvm_link =
2062 mvmvif->link[link_sta->link_id];
2063 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2064 struct iwl_mvm_link_sta *mvm_link_sta;
2065 u8 sta_id;
2066
2067 lockdep_assert_held(&mvm->mutex);
2068
2069 mvm_link_sta =
2070 rcu_dereference_protected(mvm_sta->link[link_sta->link_id],
2071 lockdep_is_held(&mvm->mutex));
2072 sta_id = mvm_link_sta->sta_id;
2073
2074 /* If there is a TXQ still marked as reserved - free it */
2075 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
2076 u8 reserved_txq = mvm_sta->reserved_queue;
2077 enum iwl_mvm_queue_status *status;
2078
2079 /*
2080 * If no traffic has gone through the reserved TXQ - it
2081 * is still marked as IWL_MVM_QUEUE_RESERVED, and
2082 * should be manually marked as free again
2083 */
2084 status = &mvm->queue_info[reserved_txq].status;
2085 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2086 (*status != IWL_MVM_QUEUE_FREE),
2087 "sta_id %d reserved txq %d status %d",
2088 sta_id, reserved_txq, *status)) {
2089 *ret = -EINVAL;
2090 return true;
2091 }
2092
2093 *status = IWL_MVM_QUEUE_FREE;
2094 }
2095
2096 if (vif->type == NL80211_IFTYPE_STATION &&
2097 mvm_link->ap_sta_id == sta_id) {
2098 /* if associated - we can't remove the AP STA now */
2099 if (vif->cfg.assoc)
2100 return true;
2101
2102 /* first remove remaining keys */
2103 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0);
2104
2105 /* unassoc - go ahead - remove the AP STA now */
2106 mvm_link->ap_sta_id = IWL_MVM_INVALID_STA;
2107 }
2108
2109 /*
2110 * This shouldn't happen - the TDLS channel switch should be canceled
2111 * before the STA is removed.
2112 */
2113 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2114 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
2115 cancel_delayed_work(&mvm->tdls_cs.dwork);
2116 }
2117
2118 return false;
2119 }
2120
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2121 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
2122 struct ieee80211_vif *vif,
2123 struct ieee80211_sta *sta)
2124 {
2125 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2126 int ret;
2127
2128 lockdep_assert_held(&mvm->mutex);
2129
2130 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
2131 if (ret)
2132 return ret;
2133
2134 /* flush its queues here since we are freeing mvm_sta */
2135 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
2136 mvm_sta->tfd_queue_msk);
2137 if (ret)
2138 return ret;
2139 if (iwl_mvm_has_new_tx_api(mvm)) {
2140 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
2141 } else {
2142 u32 q_mask = mvm_sta->tfd_queue_msk;
2143
2144 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2145 q_mask);
2146 }
2147 if (ret)
2148 return ret;
2149
2150 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
2151
2152 iwl_mvm_disable_sta_queues(mvm, vif, sta);
2153
2154 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret))
2155 return ret;
2156
2157 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
2158 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
2159
2160 return ret;
2161 }
2162
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)2163 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2164 struct ieee80211_vif *vif,
2165 u8 sta_id)
2166 {
2167 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2168
2169 lockdep_assert_held(&mvm->mutex);
2170
2171 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2172 return ret;
2173 }
2174
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,u8 type)2175 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2176 struct iwl_mvm_int_sta *sta,
2177 u32 qmask, enum nl80211_iftype iftype,
2178 u8 type)
2179 {
2180 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2181 sta->sta_id == IWL_MVM_INVALID_STA) {
2182 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2183 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2184 return -ENOSPC;
2185 }
2186
2187 sta->tfd_queue_msk = qmask;
2188 sta->type = type;
2189
2190 /* put a non-NULL value so iterating over the stations won't stop */
2191 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2192 return 0;
2193 }
2194
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)2195 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2196 {
2197 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2198 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2199 sta->sta_id = IWL_MVM_INVALID_STA;
2200 }
2201
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)2202 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2203 u8 sta_id, u8 fifo)
2204 {
2205 unsigned int wdg_timeout =
2206 mvm->trans->trans_cfg->base_params->wd_timeout;
2207 struct iwl_trans_txq_scd_cfg cfg = {
2208 .fifo = fifo,
2209 .sta_id = sta_id,
2210 .tid = IWL_MAX_TID_COUNT,
2211 .aggregate = false,
2212 .frame_limit = IWL_FRAME_LIMIT,
2213 };
2214
2215 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2216
2217 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2218 }
2219
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2220 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2221 {
2222 unsigned int wdg_timeout =
2223 mvm->trans->trans_cfg->base_params->wd_timeout;
2224
2225 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2226
2227 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT,
2228 wdg_timeout);
2229 }
2230
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)2231 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2232 int maccolor, u8 *addr,
2233 struct iwl_mvm_int_sta *sta,
2234 u16 *queue, int fifo)
2235 {
2236 int ret;
2237
2238 /* Map queue to fifo - needs to happen before adding station */
2239 if (!iwl_mvm_has_new_tx_api(mvm))
2240 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2241
2242 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2243 if (ret) {
2244 if (!iwl_mvm_has_new_tx_api(mvm))
2245 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2246 IWL_MAX_TID_COUNT);
2247 return ret;
2248 }
2249
2250 /*
2251 * For 22000 firmware and on we cannot add queue to a station unknown
2252 * to firmware so enable queue here - after the station was added
2253 */
2254 if (iwl_mvm_has_new_tx_api(mvm)) {
2255 int txq;
2256
2257 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2258 if (txq < 0) {
2259 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2260 return txq;
2261 }
2262
2263 *queue = txq;
2264 }
2265
2266 return 0;
2267 }
2268
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2269 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2270 {
2271 int ret;
2272 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
2273 BIT(mvm->aux_queue);
2274
2275 lockdep_assert_held(&mvm->mutex);
2276
2277 /* Allocate aux station and assign to it the aux queue */
2278 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
2279 NL80211_IFTYPE_UNSPECIFIED,
2280 IWL_STA_AUX_ACTIVITY);
2281 if (ret)
2282 return ret;
2283
2284 /*
2285 * In CDB NICs we need to specify which lmac to use for aux activity
2286 * using the mac_id argument place to send lmac_id to the function
2287 */
2288 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2289 &mvm->aux_sta, &mvm->aux_queue,
2290 IWL_MVM_TX_FIFO_MCAST);
2291 if (ret) {
2292 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2293 return ret;
2294 }
2295
2296 return 0;
2297 }
2298
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2299 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2300 {
2301 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2302
2303 lockdep_assert_held(&mvm->mutex);
2304
2305 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2306 NULL, &mvm->snif_sta,
2307 &mvm->snif_queue,
2308 IWL_MVM_TX_FIFO_BE);
2309 }
2310
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2311 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2312 {
2313 int ret;
2314
2315 lockdep_assert_held(&mvm->mutex);
2316
2317 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2318 return -EINVAL;
2319
2320 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2321 &mvm->snif_queue, IWL_MAX_TID_COUNT);
2322 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2323 if (ret)
2324 IWL_WARN(mvm, "Failed sending remove station\n");
2325
2326 return ret;
2327 }
2328
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2329 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2330 {
2331 int ret;
2332
2333 lockdep_assert_held(&mvm->mutex);
2334
2335 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2336 return -EINVAL;
2337
2338 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2339 &mvm->aux_queue, IWL_MAX_TID_COUNT);
2340 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2341 if (ret)
2342 IWL_WARN(mvm, "Failed sending remove station\n");
2343 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2344
2345 return ret;
2346 }
2347
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2348 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2349 {
2350 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2351 }
2352
2353 /*
2354 * Send the add station command for the vif's broadcast station.
2355 * Assumes that the station was already allocated.
2356 *
2357 * @mvm: the mvm component
2358 * @vif: the interface to which the broadcast station is added
2359 * @bsta: the broadcast station to add.
2360 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2361 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2362 {
2363 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2364 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2365 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2366 const u8 *baddr = _baddr;
2367 int queue;
2368 int ret;
2369 unsigned int wdg_timeout =
2370 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2371 struct iwl_trans_txq_scd_cfg cfg = {
2372 .fifo = IWL_MVM_TX_FIFO_VO,
2373 .sta_id = mvmvif->deflink.bcast_sta.sta_id,
2374 .tid = IWL_MAX_TID_COUNT,
2375 .aggregate = false,
2376 .frame_limit = IWL_FRAME_LIMIT,
2377 };
2378
2379 lockdep_assert_held(&mvm->mutex);
2380
2381 if (!iwl_mvm_has_new_tx_api(mvm)) {
2382 if (vif->type == NL80211_IFTYPE_AP ||
2383 vif->type == NL80211_IFTYPE_ADHOC) {
2384 queue = mvm->probe_queue;
2385 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2386 queue = mvm->p2p_dev_queue;
2387 } else {
2388 WARN(1, "Missing required TXQ for adding bcast STA\n");
2389 return -EINVAL;
2390 }
2391
2392 bsta->tfd_queue_msk |= BIT(queue);
2393
2394 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2395 }
2396
2397 if (vif->type == NL80211_IFTYPE_ADHOC)
2398 baddr = vif->bss_conf.bssid;
2399
2400 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2401 return -ENOSPC;
2402
2403 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2404 mvmvif->id, mvmvif->color);
2405 if (ret)
2406 return ret;
2407
2408 /*
2409 * For 22000 firmware and on we cannot add queue to a station unknown
2410 * to firmware so enable queue here - after the station was added
2411 */
2412 if (iwl_mvm_has_new_tx_api(mvm)) {
2413 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id,
2414 IWL_MAX_TID_COUNT,
2415 wdg_timeout);
2416 if (queue < 0) {
2417 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2418 return queue;
2419 }
2420
2421 if (vif->type == NL80211_IFTYPE_AP ||
2422 vif->type == NL80211_IFTYPE_ADHOC) {
2423 /* for queue management */
2424 mvm->probe_queue = queue;
2425 /* for use in TX */
2426 mvmvif->deflink.mgmt_queue = queue;
2427 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2428 mvm->p2p_dev_queue = queue;
2429 }
2430 } else if (vif->type == NL80211_IFTYPE_AP ||
2431 vif->type == NL80211_IFTYPE_ADHOC) {
2432 /* set it for use in TX */
2433 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2434 }
2435
2436 return 0;
2437 }
2438
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2439 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2440 struct ieee80211_vif *vif)
2441 {
2442 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2443 u16 *queueptr, queue;
2444
2445 lockdep_assert_held(&mvm->mutex);
2446
2447 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
2448 mvmvif->deflink.bcast_sta.tfd_queue_msk);
2449
2450 switch (vif->type) {
2451 case NL80211_IFTYPE_AP:
2452 case NL80211_IFTYPE_ADHOC:
2453 queueptr = &mvm->probe_queue;
2454 break;
2455 case NL80211_IFTYPE_P2P_DEVICE:
2456 queueptr = &mvm->p2p_dev_queue;
2457 break;
2458 default:
2459 WARN(1, "Can't free bcast queue on vif type %d\n",
2460 vif->type);
2461 return;
2462 }
2463
2464 queue = *queueptr;
2465 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id,
2466 queueptr, IWL_MAX_TID_COUNT);
2467
2468 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC)
2469 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2470
2471 if (iwl_mvm_has_new_tx_api(mvm))
2472 return;
2473
2474 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue)));
2475 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue);
2476 }
2477
2478 /* Send the FW a request to remove the station from it's internal data
2479 * 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)2480 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2481 {
2482 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2483 int ret;
2484
2485 lockdep_assert_held(&mvm->mutex);
2486
2487 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2488
2489 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id);
2490 if (ret)
2491 IWL_WARN(mvm, "Failed sending remove station\n");
2492 return ret;
2493 }
2494
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2495 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2496 {
2497 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2498
2499 lockdep_assert_held(&mvm->mutex);
2500
2501 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0,
2502 ieee80211_vif_type_p2p(vif),
2503 IWL_STA_GENERAL_PURPOSE);
2504 }
2505
2506 /* Allocate a new station entry for the broadcast station to the given vif,
2507 * and send it to the FW.
2508 * Note that each P2P mac should have its own broadcast station.
2509 *
2510 * @mvm: the mvm component
2511 * @vif: the interface to which the broadcast station is added
2512 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2513 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2514 {
2515 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2516 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2517 int ret;
2518
2519 lockdep_assert_held(&mvm->mutex);
2520
2521 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2522 if (ret)
2523 return ret;
2524
2525 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2526
2527 if (ret)
2528 iwl_mvm_dealloc_int_sta(mvm, bsta);
2529
2530 return ret;
2531 }
2532
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2533 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2534 {
2535 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2536
2537 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta);
2538 }
2539
2540 /*
2541 * Send the FW a request to remove the station from it's internal data
2542 * structures, and in addition remove it from the local data structure.
2543 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2544 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2545 {
2546 int ret;
2547
2548 lockdep_assert_held(&mvm->mutex);
2549
2550 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2551
2552 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2553
2554 return ret;
2555 }
2556
2557 /*
2558 * Allocate a new station entry for the multicast station to the given vif,
2559 * and send it to the FW.
2560 * Note that each AP/GO mac should have its own multicast station.
2561 *
2562 * @mvm: the mvm component
2563 * @vif: the interface to which the multicast station is added
2564 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2565 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2566 {
2567 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2568 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta;
2569 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2570 const u8 *maddr = _maddr;
2571 struct iwl_trans_txq_scd_cfg cfg = {
2572 .fifo = vif->type == NL80211_IFTYPE_AP ?
2573 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2574 .sta_id = msta->sta_id,
2575 .tid = 0,
2576 .aggregate = false,
2577 .frame_limit = IWL_FRAME_LIMIT,
2578 };
2579 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2580 int ret;
2581
2582 lockdep_assert_held(&mvm->mutex);
2583
2584 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2585 vif->type != NL80211_IFTYPE_ADHOC))
2586 return -EOPNOTSUPP;
2587
2588 /*
2589 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2590 * invalid, so make sure we use the queue we want.
2591 * Note that this is done here as we want to avoid making DQA
2592 * changes in mac80211 layer.
2593 */
2594 if (vif->type == NL80211_IFTYPE_ADHOC)
2595 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2596
2597 /*
2598 * While in previous FWs we had to exclude cab queue from TFD queue
2599 * mask, now it is needed as any other queue.
2600 */
2601 if (!iwl_mvm_has_new_tx_api(mvm) &&
2602 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2603 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2604 &cfg,
2605 timeout);
2606 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue);
2607 }
2608 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2609 mvmvif->id, mvmvif->color);
2610 if (ret)
2611 goto err;
2612
2613 /*
2614 * Enable cab queue after the ADD_STA command is sent.
2615 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2616 * command with unknown station id, and for FW that doesn't support
2617 * station API since the cab queue is not included in the
2618 * tfd_queue_mask.
2619 */
2620 if (iwl_mvm_has_new_tx_api(mvm)) {
2621 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id,
2622 0, timeout);
2623 if (queue < 0) {
2624 ret = queue;
2625 goto err;
2626 }
2627 mvmvif->deflink.cab_queue = queue;
2628 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2629 IWL_UCODE_TLV_API_STA_TYPE))
2630 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2631 &cfg,
2632 timeout);
2633
2634 return 0;
2635 err:
2636 iwl_mvm_dealloc_int_sta(mvm, msta);
2637 return ret;
2638 }
2639
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2640 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2641 struct ieee80211_key_conf *keyconf,
2642 bool mcast)
2643 {
2644 union {
2645 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2646 struct iwl_mvm_add_sta_key_cmd cmd;
2647 } u = {};
2648 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2649 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2650 __le16 key_flags;
2651 int ret, size;
2652 u32 status;
2653
2654 /* This is a valid situation for GTK removal */
2655 if (sta_id == IWL_MVM_INVALID_STA)
2656 return 0;
2657
2658 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2659 STA_KEY_FLG_KEYID_MSK);
2660 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2661 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2662
2663 if (mcast)
2664 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2665
2666 /*
2667 * The fields assigned here are in the same location at the start
2668 * of the command, so we can do this union trick.
2669 */
2670 u.cmd.common.key_flags = key_flags;
2671 u.cmd.common.key_offset = keyconf->hw_key_idx;
2672 u.cmd.common.sta_id = sta_id;
2673
2674 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2675
2676 status = ADD_STA_SUCCESS;
2677 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2678 &status);
2679
2680 switch (status) {
2681 case ADD_STA_SUCCESS:
2682 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2683 break;
2684 default:
2685 ret = -EIO;
2686 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2687 break;
2688 }
2689
2690 return ret;
2691 }
2692
2693 /*
2694 * Send the FW a request to remove the station from it's internal data
2695 * structures, and in addition remove it from the local data structure.
2696 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2697 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2698 {
2699 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2700 int ret;
2701
2702 lockdep_assert_held(&mvm->mutex);
2703
2704 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id,
2705 mvmvif->deflink.mcast_sta.tfd_queue_msk);
2706
2707 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id,
2708 &mvmvif->deflink.cab_queue, 0);
2709
2710 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id);
2711 if (ret)
2712 IWL_WARN(mvm, "Failed sending remove station\n");
2713
2714 return ret;
2715 }
2716
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2717 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2718 {
2719 struct iwl_mvm_delba_data notif = {
2720 .baid = baid,
2721 };
2722
2723 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2724 ¬if, sizeof(notif));
2725 };
2726
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2727 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2728 struct iwl_mvm_baid_data *data)
2729 {
2730 int i;
2731
2732 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2733
2734 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2735 int j;
2736 struct iwl_mvm_reorder_buffer *reorder_buf =
2737 &data->reorder_buf[i];
2738 struct iwl_mvm_reorder_buf_entry *entries =
2739 &data->entries[i * data->entries_per_queue];
2740
2741 spin_lock_bh(&reorder_buf->lock);
2742 if (likely(!reorder_buf->num_stored)) {
2743 spin_unlock_bh(&reorder_buf->lock);
2744 continue;
2745 }
2746
2747 /*
2748 * This shouldn't happen in regular DELBA since the internal
2749 * delBA notification should trigger a release of all frames in
2750 * the reorder buffer.
2751 */
2752 WARN_ON(1);
2753
2754 for (j = 0; j < data->buf_size; j++)
2755 __skb_queue_purge(&entries[j].frames);
2756
2757 spin_unlock_bh(&reorder_buf->lock);
2758 }
2759 }
2760
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn)2761 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2762 struct iwl_mvm_baid_data *data,
2763 u16 ssn)
2764 {
2765 int i;
2766
2767 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2768 struct iwl_mvm_reorder_buffer *reorder_buf =
2769 &data->reorder_buf[i];
2770 struct iwl_mvm_reorder_buf_entry *entries =
2771 &data->entries[i * data->entries_per_queue];
2772 int j;
2773
2774 reorder_buf->num_stored = 0;
2775 reorder_buf->head_sn = ssn;
2776 spin_lock_init(&reorder_buf->lock);
2777 reorder_buf->queue = i;
2778 reorder_buf->valid = false;
2779 for (j = 0; j < data->buf_size; j++)
2780 __skb_queue_head_init(&entries[j].frames);
2781 }
2782 }
2783
iwl_mvm_fw_baid_op_sta(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size)2784 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2785 struct ieee80211_sta *sta,
2786 bool start, int tid, u16 ssn,
2787 u16 buf_size)
2788 {
2789 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2790 struct iwl_mvm_add_sta_cmd cmd = {
2791 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2792 .sta_id = mvm_sta->deflink.sta_id,
2793 .add_modify = STA_MODE_MODIFY,
2794 };
2795 u32 status;
2796 int ret;
2797
2798 if (start) {
2799 cmd.add_immediate_ba_tid = tid;
2800 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2801 cmd.rx_ba_window = cpu_to_le16(buf_size);
2802 cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2803 } else {
2804 cmd.remove_immediate_ba_tid = tid;
2805 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2806 }
2807
2808 status = ADD_STA_SUCCESS;
2809 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2810 iwl_mvm_add_sta_cmd_size(mvm),
2811 &cmd, &status);
2812 if (ret)
2813 return ret;
2814
2815 switch (status & IWL_ADD_STA_STATUS_MASK) {
2816 case ADD_STA_SUCCESS:
2817 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2818 start ? "start" : "stopp");
2819 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2820 !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2821 return -EINVAL;
2822 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2823 case ADD_STA_IMMEDIATE_BA_FAILURE:
2824 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2825 return -ENOSPC;
2826 default:
2827 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2828 start ? "start" : "stopp", status);
2829 return -EIO;
2830 }
2831 }
2832
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)2833 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2834 struct ieee80211_sta *sta,
2835 bool start, int tid, u16 ssn,
2836 u16 buf_size, int baid)
2837 {
2838 struct iwl_rx_baid_cfg_cmd cmd = {
2839 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2840 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2841 };
2842 struct iwl_host_cmd hcmd = {
2843 .id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD),
2844 .flags = CMD_SEND_IN_RFKILL,
2845 .len[0] = sizeof(cmd),
2846 .data[0] = &cmd,
2847 };
2848 int ret;
2849
2850 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2851
2852 if (start) {
2853 cmd.alloc.sta_id_mask =
2854 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2855 cmd.alloc.tid = tid;
2856 cmd.alloc.ssn = cpu_to_le16(ssn);
2857 cmd.alloc.win_size = cpu_to_le16(buf_size);
2858 baid = -EIO;
2859 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 1) == 1) {
2860 cmd.remove_v1.baid = cpu_to_le32(baid);
2861 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2862 } else {
2863 cmd.remove.sta_id_mask =
2864 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2865 cmd.remove.tid = cpu_to_le32(tid);
2866 }
2867
2868 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &baid);
2869 if (ret)
2870 return ret;
2871
2872 if (!start) {
2873 /* ignore firmware baid on remove */
2874 baid = 0;
2875 }
2876
2877 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2878 start ? "start" : "stopp");
2879
2880 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2881 return -EINVAL;
2882
2883 return baid;
2884 }
2885
iwl_mvm_fw_baid_op(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2886 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2887 bool start, int tid, u16 ssn, u16 buf_size,
2888 int baid)
2889 {
2890 if (fw_has_capa(&mvm->fw->ucode_capa,
2891 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2892 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start,
2893 tid, ssn, buf_size, baid);
2894
2895 return iwl_mvm_fw_baid_op_sta(mvm, sta, start,
2896 tid, ssn, buf_size);
2897 }
2898
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2899 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2900 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2901 {
2902 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2903 struct iwl_mvm_baid_data *baid_data = NULL;
2904 int ret, baid;
2905 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2906 IWL_MAX_BAID_OLD;
2907
2908 lockdep_assert_held(&mvm->mutex);
2909
2910 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2911 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2912 return -ENOSPC;
2913 }
2914
2915 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2916 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2917
2918 /* sparse doesn't like the __align() so don't check */
2919 #ifndef __CHECKER__
2920 /*
2921 * The division below will be OK if either the cache line size
2922 * can be divided by the entry size (ALIGN will round up) or if
2923 * if the entry size can be divided by the cache line size, in
2924 * which case the ALIGN() will do nothing.
2925 */
2926 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2927 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2928 #endif
2929
2930 /*
2931 * Upward align the reorder buffer size to fill an entire cache
2932 * line for each queue, to avoid sharing cache lines between
2933 * different queues.
2934 */
2935 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2936
2937 /*
2938 * Allocate here so if allocation fails we can bail out early
2939 * before starting the BA session in the firmware
2940 */
2941 baid_data = kzalloc(sizeof(*baid_data) +
2942 mvm->trans->num_rx_queues *
2943 reorder_buf_size,
2944 GFP_KERNEL);
2945 if (!baid_data)
2946 return -ENOMEM;
2947
2948 /*
2949 * This division is why we need the above BUILD_BUG_ON(),
2950 * if that doesn't hold then this will not be right.
2951 */
2952 baid_data->entries_per_queue =
2953 reorder_buf_size / sizeof(baid_data->entries[0]);
2954 }
2955
2956 if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2957 baid = mvm_sta->tid_to_baid[tid];
2958 } else {
2959 /* we don't really need it in this case */
2960 baid = -1;
2961 }
2962
2963 /* Don't send command to remove (start=0) BAID during restart */
2964 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2965 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size,
2966 baid);
2967
2968 if (baid < 0) {
2969 ret = baid;
2970 goto out_free;
2971 }
2972
2973 if (start) {
2974 mvm->rx_ba_sessions++;
2975
2976 if (!iwl_mvm_has_new_rx_api(mvm))
2977 return 0;
2978
2979 baid_data->baid = baid;
2980 baid_data->timeout = timeout;
2981 baid_data->last_rx = jiffies;
2982 baid_data->rcu_ptr = &mvm->baid_map[baid];
2983 timer_setup(&baid_data->session_timer,
2984 iwl_mvm_rx_agg_session_expired, 0);
2985 baid_data->mvm = mvm;
2986 baid_data->tid = tid;
2987 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
2988 baid_data->buf_size = buf_size;
2989
2990 mvm_sta->tid_to_baid[tid] = baid;
2991 if (timeout)
2992 mod_timer(&baid_data->session_timer,
2993 TU_TO_EXP_TIME(timeout * 2));
2994
2995 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn);
2996 /*
2997 * protect the BA data with RCU to cover a case where our
2998 * internal RX sync mechanism will timeout (not that it's
2999 * supposed to happen) and we will free the session data while
3000 * RX is being processed in parallel
3001 */
3002 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
3003 mvm_sta->deflink.sta_id, tid, baid);
3004 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
3005 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
3006 } else {
3007 baid = mvm_sta->tid_to_baid[tid];
3008
3009 if (mvm->rx_ba_sessions > 0)
3010 /* check that restart flow didn't zero the counter */
3011 mvm->rx_ba_sessions--;
3012 if (!iwl_mvm_has_new_rx_api(mvm))
3013 return 0;
3014
3015 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
3016 return -EINVAL;
3017
3018 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
3019 if (WARN_ON(!baid_data))
3020 return -EINVAL;
3021
3022 /* synchronize all rx queues so we can safely delete */
3023 iwl_mvm_free_reorder(mvm, baid_data);
3024 timer_shutdown_sync(&baid_data->session_timer);
3025 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
3026 kfree_rcu(baid_data, rcu_head);
3027 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
3028 }
3029 return 0;
3030
3031 out_free:
3032 kfree(baid_data);
3033 return ret;
3034 }
3035
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)3036 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3037 int tid, u8 queue, bool start)
3038 {
3039 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3040 struct iwl_mvm_add_sta_cmd cmd = {};
3041 int ret;
3042 u32 status;
3043
3044 lockdep_assert_held(&mvm->mutex);
3045
3046 if (start) {
3047 mvm_sta->tfd_queue_msk |= BIT(queue);
3048 mvm_sta->tid_disable_agg &= ~BIT(tid);
3049 } else {
3050 /* In DQA-mode the queue isn't removed on agg termination */
3051 mvm_sta->tid_disable_agg |= BIT(tid);
3052 }
3053
3054 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
3055 cmd.sta_id = mvm_sta->deflink.sta_id;
3056 cmd.add_modify = STA_MODE_MODIFY;
3057 if (!iwl_mvm_has_new_tx_api(mvm))
3058 cmd.modify_mask = STA_MODIFY_QUEUES;
3059 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
3060 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
3061 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
3062
3063 status = ADD_STA_SUCCESS;
3064 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
3065 iwl_mvm_add_sta_cmd_size(mvm),
3066 &cmd, &status);
3067 if (ret)
3068 return ret;
3069
3070 switch (status & IWL_ADD_STA_STATUS_MASK) {
3071 case ADD_STA_SUCCESS:
3072 break;
3073 default:
3074 ret = -EIO;
3075 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
3076 start ? "start" : "stopp", status);
3077 break;
3078 }
3079
3080 return ret;
3081 }
3082
3083 const u8 tid_to_mac80211_ac[] = {
3084 IEEE80211_AC_BE,
3085 IEEE80211_AC_BK,
3086 IEEE80211_AC_BK,
3087 IEEE80211_AC_BE,
3088 IEEE80211_AC_VI,
3089 IEEE80211_AC_VI,
3090 IEEE80211_AC_VO,
3091 IEEE80211_AC_VO,
3092 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
3093 };
3094
3095 static const u8 tid_to_ucode_ac[] = {
3096 AC_BE,
3097 AC_BK,
3098 AC_BK,
3099 AC_BE,
3100 AC_VI,
3101 AC_VI,
3102 AC_VO,
3103 AC_VO,
3104 };
3105
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)3106 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3107 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3108 {
3109 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3110 struct iwl_mvm_tid_data *tid_data;
3111 u16 normalized_ssn;
3112 u16 txq_id;
3113 int ret;
3114
3115 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
3116 return -EINVAL;
3117
3118 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
3119 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
3120 IWL_ERR(mvm,
3121 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
3122 mvmsta->tid_data[tid].state);
3123 return -ENXIO;
3124 }
3125
3126 lockdep_assert_held(&mvm->mutex);
3127
3128 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
3129 iwl_mvm_has_new_tx_api(mvm)) {
3130 u8 ac = tid_to_mac80211_ac[tid];
3131
3132 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
3133 if (ret)
3134 return ret;
3135 }
3136
3137 spin_lock_bh(&mvmsta->lock);
3138
3139 /*
3140 * Note the possible cases:
3141 * 1. An enabled TXQ - TXQ needs to become agg'ed
3142 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
3143 * it as reserved
3144 */
3145 txq_id = mvmsta->tid_data[tid].txq_id;
3146 if (txq_id == IWL_MVM_INVALID_QUEUE) {
3147 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
3148 IWL_MVM_DQA_MIN_DATA_QUEUE,
3149 IWL_MVM_DQA_MAX_DATA_QUEUE);
3150 if (ret < 0) {
3151 IWL_ERR(mvm, "Failed to allocate agg queue\n");
3152 goto out;
3153 }
3154
3155 txq_id = ret;
3156
3157 /* TXQ hasn't yet been enabled, so mark it only as reserved */
3158 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
3159 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
3160 ret = -ENXIO;
3161 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
3162 tid, IWL_MAX_HW_QUEUES - 1);
3163 goto out;
3164
3165 } else if (unlikely(mvm->queue_info[txq_id].status ==
3166 IWL_MVM_QUEUE_SHARED)) {
3167 ret = -ENXIO;
3168 IWL_DEBUG_TX_QUEUES(mvm,
3169 "Can't start tid %d agg on shared queue!\n",
3170 tid);
3171 goto out;
3172 }
3173
3174 IWL_DEBUG_TX_QUEUES(mvm,
3175 "AGG for tid %d will be on queue #%d\n",
3176 tid, txq_id);
3177
3178 tid_data = &mvmsta->tid_data[tid];
3179 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3180 tid_data->txq_id = txq_id;
3181 *ssn = tid_data->ssn;
3182
3183 IWL_DEBUG_TX_QUEUES(mvm,
3184 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3185 mvmsta->deflink.sta_id, tid, txq_id,
3186 tid_data->ssn,
3187 tid_data->next_reclaimed);
3188
3189 /*
3190 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3191 * to align the wrap around of ssn so we compare relevant values.
3192 */
3193 normalized_ssn = tid_data->ssn;
3194 if (mvm->trans->trans_cfg->gen2)
3195 normalized_ssn &= 0xff;
3196
3197 if (normalized_ssn == tid_data->next_reclaimed) {
3198 tid_data->state = IWL_AGG_STARTING;
3199 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3200 } else {
3201 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3202 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3203 }
3204
3205 out:
3206 spin_unlock_bh(&mvmsta->lock);
3207
3208 return ret;
3209 }
3210
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)3211 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3212 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3213 bool amsdu)
3214 {
3215 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3216 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3217 unsigned int wdg_timeout =
3218 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
3219 int queue, ret;
3220 bool alloc_queue = true;
3221 enum iwl_mvm_queue_status queue_status;
3222 u16 ssn;
3223
3224 struct iwl_trans_txq_scd_cfg cfg = {
3225 .sta_id = mvmsta->deflink.sta_id,
3226 .tid = tid,
3227 .frame_limit = buf_size,
3228 .aggregate = true,
3229 };
3230
3231 /*
3232 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3233 * manager, so this function should never be called in this case.
3234 */
3235 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3236 return -EINVAL;
3237
3238 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3239 != IWL_MAX_TID_COUNT);
3240
3241 spin_lock_bh(&mvmsta->lock);
3242 ssn = tid_data->ssn;
3243 queue = tid_data->txq_id;
3244 tid_data->state = IWL_AGG_ON;
3245 mvmsta->agg_tids |= BIT(tid);
3246 tid_data->ssn = 0xffff;
3247 tid_data->amsdu_in_ampdu_allowed = amsdu;
3248 spin_unlock_bh(&mvmsta->lock);
3249
3250 if (iwl_mvm_has_new_tx_api(mvm)) {
3251 /*
3252 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3253 * would have failed, so if we are here there is no need to
3254 * allocate a queue.
3255 * However, if aggregation size is different than the default
3256 * size, the scheduler should be reconfigured.
3257 * We cannot do this with the new TX API, so return unsupported
3258 * for now, until it will be offloaded to firmware..
3259 * Note that if SCD default value changes - this condition
3260 * should be updated as well.
3261 */
3262 if (buf_size < IWL_FRAME_LIMIT)
3263 return -EOPNOTSUPP;
3264
3265 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3266 if (ret)
3267 return -EIO;
3268 goto out;
3269 }
3270
3271 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3272
3273 queue_status = mvm->queue_info[queue].status;
3274
3275 /* Maybe there is no need to even alloc a queue... */
3276 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3277 alloc_queue = false;
3278
3279 /*
3280 * Only reconfig the SCD for the queue if the window size has
3281 * changed from current (become smaller)
3282 */
3283 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3284 /*
3285 * If reconfiguring an existing queue, it first must be
3286 * drained
3287 */
3288 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3289 BIT(queue));
3290 if (ret) {
3291 IWL_ERR(mvm,
3292 "Error draining queue before reconfig\n");
3293 return ret;
3294 }
3295
3296 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3297 mvmsta->deflink.sta_id, tid,
3298 buf_size, ssn);
3299 if (ret) {
3300 IWL_ERR(mvm,
3301 "Error reconfiguring TXQ #%d\n", queue);
3302 return ret;
3303 }
3304 }
3305
3306 if (alloc_queue)
3307 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3308 &cfg, wdg_timeout);
3309
3310 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3311 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3312 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3313 if (ret)
3314 return -EIO;
3315 }
3316
3317 /* No need to mark as reserved */
3318 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3319
3320 out:
3321 /*
3322 * Even though in theory the peer could have different
3323 * aggregation reorder buffer sizes for different sessions,
3324 * our ucode doesn't allow for that and has a global limit
3325 * for each station. Therefore, use the minimum of all the
3326 * aggregation sessions and our default value.
3327 */
3328 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
3329 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize,
3330 buf_size);
3331 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit =
3332 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize;
3333
3334 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3335 sta->addr, tid);
3336
3337 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq);
3338 }
3339
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3340 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3341 struct iwl_mvm_sta *mvmsta,
3342 struct iwl_mvm_tid_data *tid_data)
3343 {
3344 u16 txq_id = tid_data->txq_id;
3345
3346 lockdep_assert_held(&mvm->mutex);
3347
3348 if (iwl_mvm_has_new_tx_api(mvm))
3349 return;
3350
3351 /*
3352 * The TXQ is marked as reserved only if no traffic came through yet
3353 * This means no traffic has been sent on this TID (agg'd or not), so
3354 * we no longer have use for the queue. Since it hasn't even been
3355 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3356 * free.
3357 */
3358 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3359 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3360 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3361 }
3362 }
3363
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3364 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3365 struct ieee80211_sta *sta, u16 tid)
3366 {
3367 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3368 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3369 u16 txq_id;
3370 int err;
3371
3372 /*
3373 * If mac80211 is cleaning its state, then say that we finished since
3374 * our state has been cleared anyway.
3375 */
3376 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3377 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3378 return 0;
3379 }
3380
3381 spin_lock_bh(&mvmsta->lock);
3382
3383 txq_id = tid_data->txq_id;
3384
3385 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3386 mvmsta->deflink.sta_id, tid, txq_id,
3387 tid_data->state);
3388
3389 mvmsta->agg_tids &= ~BIT(tid);
3390
3391 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3392
3393 switch (tid_data->state) {
3394 case IWL_AGG_ON:
3395 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3396
3397 IWL_DEBUG_TX_QUEUES(mvm,
3398 "ssn = %d, next_recl = %d\n",
3399 tid_data->ssn, tid_data->next_reclaimed);
3400
3401 tid_data->ssn = 0xffff;
3402 tid_data->state = IWL_AGG_OFF;
3403 spin_unlock_bh(&mvmsta->lock);
3404
3405 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3406
3407 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3408 return 0;
3409 case IWL_AGG_STARTING:
3410 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3411 /*
3412 * The agg session has been stopped before it was set up. This
3413 * can happen when the AddBA timer times out for example.
3414 */
3415
3416 /* No barriers since we are under mutex */
3417 lockdep_assert_held(&mvm->mutex);
3418
3419 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3420 tid_data->state = IWL_AGG_OFF;
3421 err = 0;
3422 break;
3423 default:
3424 IWL_ERR(mvm,
3425 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3426 mvmsta->deflink.sta_id, tid, tid_data->state);
3427 IWL_ERR(mvm,
3428 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3429 err = -EINVAL;
3430 }
3431
3432 spin_unlock_bh(&mvmsta->lock);
3433
3434 return err;
3435 }
3436
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3437 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3438 struct ieee80211_sta *sta, u16 tid)
3439 {
3440 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3441 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3442 u16 txq_id;
3443 enum iwl_mvm_agg_state old_state;
3444
3445 /*
3446 * First set the agg state to OFF to avoid calling
3447 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3448 */
3449 spin_lock_bh(&mvmsta->lock);
3450 txq_id = tid_data->txq_id;
3451 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3452 mvmsta->deflink.sta_id, tid, txq_id,
3453 tid_data->state);
3454 old_state = tid_data->state;
3455 tid_data->state = IWL_AGG_OFF;
3456 mvmsta->agg_tids &= ~BIT(tid);
3457 spin_unlock_bh(&mvmsta->lock);
3458
3459 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3460
3461 if (old_state >= IWL_AGG_ON) {
3462 iwl_mvm_drain_sta(mvm, mvmsta, true);
3463
3464 if (iwl_mvm_has_new_tx_api(mvm)) {
3465 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id,
3466 BIT(tid)))
3467 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3468 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3469 } else {
3470 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3471 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3472 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3473 }
3474
3475 iwl_mvm_drain_sta(mvm, mvmsta, false);
3476
3477 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3478 }
3479
3480 return 0;
3481 }
3482
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3483 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3484 {
3485 int i, max = -1, max_offs = -1;
3486
3487 lockdep_assert_held(&mvm->mutex);
3488
3489 /* Pick the unused key offset with the highest 'deleted'
3490 * counter. Every time a key is deleted, all the counters
3491 * are incremented and the one that was just deleted is
3492 * reset to zero. Thus, the highest counter is the one
3493 * that was deleted longest ago. Pick that one.
3494 */
3495 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3496 if (test_bit(i, mvm->fw_key_table))
3497 continue;
3498 if (mvm->fw_key_deleted[i] > max) {
3499 max = mvm->fw_key_deleted[i];
3500 max_offs = i;
3501 }
3502 }
3503
3504 if (max_offs < 0)
3505 return STA_KEY_IDX_INVALID;
3506
3507 return max_offs;
3508 }
3509
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3510 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3511 struct ieee80211_vif *vif,
3512 struct ieee80211_sta *sta)
3513 {
3514 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3515
3516 if (sta)
3517 return iwl_mvm_sta_from_mac80211(sta);
3518
3519 /*
3520 * The device expects GTKs for station interfaces to be
3521 * installed as GTKs for the AP station. If we have no
3522 * station ID, then use AP's station ID.
3523 */
3524 if (vif->type == NL80211_IFTYPE_STATION &&
3525 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3526 u8 sta_id = mvmvif->deflink.ap_sta_id;
3527
3528 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3529 lockdep_is_held(&mvm->mutex));
3530
3531 /*
3532 * It is possible that the 'sta' parameter is NULL,
3533 * for example when a GTK is removed - the sta_id will then
3534 * be the AP ID, and no station was passed by mac80211.
3535 */
3536 if (IS_ERR_OR_NULL(sta))
3537 return NULL;
3538
3539 return iwl_mvm_sta_from_mac80211(sta);
3540 }
3541
3542 return NULL;
3543 }
3544
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3545 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3546 {
3547 int i;
3548
3549 for (i = len - 1; i >= 0; i--) {
3550 if (pn1[i] > pn2[i])
3551 return 1;
3552 if (pn1[i] < pn2[i])
3553 return -1;
3554 }
3555
3556 return 0;
3557 }
3558
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)3559 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3560 u32 sta_id,
3561 struct ieee80211_key_conf *key, bool mcast,
3562 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3563 u8 key_offset, bool mfp)
3564 {
3565 union {
3566 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3567 struct iwl_mvm_add_sta_key_cmd cmd;
3568 } u = {};
3569 __le16 key_flags;
3570 int ret;
3571 u32 status;
3572 u16 keyidx;
3573 u64 pn = 0;
3574 int i, size;
3575 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3576 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3577 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3578 new_api ? 2 : 1);
3579
3580 if (sta_id == IWL_MVM_INVALID_STA)
3581 return -EINVAL;
3582
3583 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3584 STA_KEY_FLG_KEYID_MSK;
3585 key_flags = cpu_to_le16(keyidx);
3586 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3587
3588 if (key->flags & IEEE80211_KEY_FLAG_SPP_AMSDU)
3589 key_flags |= cpu_to_le16(STA_KEY_FLG_AMSDU_SPP);
3590
3591 switch (key->cipher) {
3592 case WLAN_CIPHER_SUITE_TKIP:
3593 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3594 if (api_ver >= 2) {
3595 memcpy((void *)&u.cmd.tx_mic_key,
3596 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3597 IWL_MIC_KEY_SIZE);
3598
3599 memcpy((void *)&u.cmd.rx_mic_key,
3600 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3601 IWL_MIC_KEY_SIZE);
3602 pn = atomic64_read(&key->tx_pn);
3603
3604 } else {
3605 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3606 for (i = 0; i < 5; i++)
3607 u.cmd_v1.tkip_rx_ttak[i] =
3608 cpu_to_le16(tkip_p1k[i]);
3609 }
3610 memcpy(u.cmd.common.key, key->key, key->keylen);
3611 break;
3612 case WLAN_CIPHER_SUITE_CCMP:
3613 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3614 memcpy(u.cmd.common.key, key->key, key->keylen);
3615 if (api_ver >= 2)
3616 pn = atomic64_read(&key->tx_pn);
3617 break;
3618 case WLAN_CIPHER_SUITE_WEP104:
3619 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3620 fallthrough;
3621 case WLAN_CIPHER_SUITE_WEP40:
3622 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3623 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3624 break;
3625 case WLAN_CIPHER_SUITE_GCMP_256:
3626 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3627 fallthrough;
3628 case WLAN_CIPHER_SUITE_GCMP:
3629 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3630 memcpy(u.cmd.common.key, key->key, key->keylen);
3631 if (api_ver >= 2)
3632 pn = atomic64_read(&key->tx_pn);
3633 break;
3634 default:
3635 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3636 memcpy(u.cmd.common.key, key->key, key->keylen);
3637 }
3638
3639 if (mcast)
3640 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3641 if (mfp)
3642 key_flags |= cpu_to_le16(STA_KEY_MFP);
3643
3644 u.cmd.common.key_offset = key_offset;
3645 u.cmd.common.key_flags = key_flags;
3646 u.cmd.common.sta_id = sta_id;
3647
3648 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3649 i = 0;
3650 else
3651 i = -1;
3652
3653 for (; i < IEEE80211_NUM_TIDS; i++) {
3654 struct ieee80211_key_seq seq = {};
3655 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3656 int rx_pn_len = 8;
3657 /* there's a hole at 2/3 in FW format depending on version */
3658 int hole = api_ver >= 3 ? 0 : 2;
3659
3660 ieee80211_get_key_rx_seq(key, i, &seq);
3661
3662 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3663 rx_pn[0] = seq.tkip.iv16;
3664 rx_pn[1] = seq.tkip.iv16 >> 8;
3665 rx_pn[2 + hole] = seq.tkip.iv32;
3666 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3667 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3668 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3669 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3670 rx_pn = seq.hw.seq;
3671 rx_pn_len = seq.hw.seq_len;
3672 } else {
3673 rx_pn[0] = seq.ccmp.pn[0];
3674 rx_pn[1] = seq.ccmp.pn[1];
3675 rx_pn[2 + hole] = seq.ccmp.pn[2];
3676 rx_pn[3 + hole] = seq.ccmp.pn[3];
3677 rx_pn[4 + hole] = seq.ccmp.pn[4];
3678 rx_pn[5 + hole] = seq.ccmp.pn[5];
3679 }
3680
3681 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3682 rx_pn_len) > 0)
3683 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3684 rx_pn_len);
3685 }
3686
3687 if (api_ver >= 2) {
3688 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3689 size = sizeof(u.cmd);
3690 } else {
3691 size = sizeof(u.cmd_v1);
3692 }
3693
3694 status = ADD_STA_SUCCESS;
3695 if (cmd_flags & CMD_ASYNC)
3696 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3697 &u.cmd);
3698 else
3699 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3700 &u.cmd, &status);
3701
3702 switch (status) {
3703 case ADD_STA_SUCCESS:
3704 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3705 break;
3706 default:
3707 ret = -EIO;
3708 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3709 break;
3710 }
3711
3712 return ret;
3713 }
3714
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3715 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3716 struct ieee80211_key_conf *keyconf,
3717 u8 sta_id, bool remove_key)
3718 {
3719 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3720
3721 /* verify the key details match the required command's expectations */
3722 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3723 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3724 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3725 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3726 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3727 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3728 return -EINVAL;
3729
3730 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3731 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3732 return -EINVAL;
3733
3734 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3735 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3736
3737 if (remove_key) {
3738 /* This is a valid situation for IGTK */
3739 if (sta_id == IWL_MVM_INVALID_STA)
3740 return 0;
3741
3742 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3743 } else {
3744 struct ieee80211_key_seq seq;
3745 const u8 *pn;
3746
3747 switch (keyconf->cipher) {
3748 case WLAN_CIPHER_SUITE_AES_CMAC:
3749 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3750 break;
3751 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3752 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3753 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3754 break;
3755 default:
3756 return -EINVAL;
3757 }
3758
3759 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3760 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3761 igtk_cmd.ctrl_flags |=
3762 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3763 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3764 pn = seq.aes_cmac.pn;
3765 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3766 ((u64) pn[4] << 8) |
3767 ((u64) pn[3] << 16) |
3768 ((u64) pn[2] << 24) |
3769 ((u64) pn[1] << 32) |
3770 ((u64) pn[0] << 40));
3771 }
3772
3773 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3774 remove_key ? "removing" : "installing",
3775 keyconf->keyidx >= 6 ? "B" : "",
3776 keyconf->keyidx, igtk_cmd.sta_id);
3777
3778 if (!iwl_mvm_has_new_rx_api(mvm)) {
3779 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3780 .ctrl_flags = igtk_cmd.ctrl_flags,
3781 .key_id = igtk_cmd.key_id,
3782 .sta_id = igtk_cmd.sta_id,
3783 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3784 };
3785
3786 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3787 ARRAY_SIZE(igtk_cmd_v1.igtk));
3788 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3789 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3790 }
3791 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3792 sizeof(igtk_cmd), &igtk_cmd);
3793 }
3794
3795
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3796 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3797 struct ieee80211_vif *vif,
3798 struct ieee80211_sta *sta)
3799 {
3800 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3801
3802 if (sta)
3803 return sta->addr;
3804
3805 if (vif->type == NL80211_IFTYPE_STATION &&
3806 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3807 u8 sta_id = mvmvif->deflink.ap_sta_id;
3808 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3809 lockdep_is_held(&mvm->mutex));
3810 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
3811 return NULL;
3812
3813 return sta->addr;
3814 }
3815
3816
3817 return NULL;
3818 }
3819
__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)3820 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3821 struct ieee80211_vif *vif,
3822 struct ieee80211_sta *sta,
3823 struct ieee80211_key_conf *keyconf,
3824 u8 key_offset,
3825 bool mcast)
3826 {
3827 const u8 *addr;
3828 struct ieee80211_key_seq seq;
3829 u16 p1k[5];
3830 u32 sta_id;
3831 bool mfp = false;
3832
3833 if (sta) {
3834 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3835
3836 sta_id = mvm_sta->deflink.sta_id;
3837 mfp = sta->mfp;
3838 } else if (vif->type == NL80211_IFTYPE_AP &&
3839 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3840 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3841
3842 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3843 } else {
3844 IWL_ERR(mvm, "Failed to find station id\n");
3845 return -EINVAL;
3846 }
3847
3848 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3849 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3850 if (!addr) {
3851 IWL_ERR(mvm, "Failed to find mac address\n");
3852 return -EINVAL;
3853 }
3854
3855 /* get phase 1 key from mac80211 */
3856 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3857 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3858
3859 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3860 seq.tkip.iv32, p1k, 0, key_offset,
3861 mfp);
3862 }
3863
3864 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3865 0, NULL, 0, key_offset, mfp);
3866 }
3867
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)3868 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3869 struct ieee80211_vif *vif,
3870 struct ieee80211_sta *sta,
3871 struct ieee80211_key_conf *keyconf,
3872 u8 key_offset)
3873 {
3874 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3875 struct iwl_mvm_sta *mvm_sta;
3876 u8 sta_id = IWL_MVM_INVALID_STA;
3877 int ret;
3878 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3879
3880 lockdep_assert_held(&mvm->mutex);
3881
3882 if (vif->type != NL80211_IFTYPE_AP ||
3883 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3884 /* Get the station id from the mvm local station table */
3885 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3886 if (!mvm_sta) {
3887 IWL_ERR(mvm, "Failed to find station\n");
3888 return -EINVAL;
3889 }
3890 sta_id = mvm_sta->deflink.sta_id;
3891
3892 /*
3893 * It is possible that the 'sta' parameter is NULL, and thus
3894 * there is a need to retrieve the sta from the local station
3895 * table.
3896 */
3897 if (!sta) {
3898 sta = rcu_dereference_protected(
3899 mvm->fw_id_to_mac_id[sta_id],
3900 lockdep_is_held(&mvm->mutex));
3901 if (IS_ERR_OR_NULL(sta)) {
3902 IWL_ERR(mvm, "Invalid station id\n");
3903 return -EINVAL;
3904 }
3905 }
3906
3907 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3908 return -EINVAL;
3909 } else {
3910 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3911
3912 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3913 }
3914
3915 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3916 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3917 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3918 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3919 goto end;
3920 }
3921
3922 /* If the key_offset is not pre-assigned, we need to find a
3923 * new offset to use. In normal cases, the offset is not
3924 * pre-assigned, but during HW_RESTART we want to reuse the
3925 * same indices, so we pass them when this function is called.
3926 *
3927 * In D3 entry, we need to hardcoded the indices (because the
3928 * firmware hardcodes the PTK offset to 0). In this case, we
3929 * need to make sure we don't overwrite the hw_key_idx in the
3930 * keyconf structure, because otherwise we cannot configure
3931 * the original ones back when resuming.
3932 */
3933 if (key_offset == STA_KEY_IDX_INVALID) {
3934 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3935 if (key_offset == STA_KEY_IDX_INVALID)
3936 return -ENOSPC;
3937 keyconf->hw_key_idx = key_offset;
3938 }
3939
3940 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3941 if (ret)
3942 goto end;
3943
3944 /*
3945 * For WEP, the same key is used for multicast and unicast. Upload it
3946 * again, using the same key offset, and now pointing the other one
3947 * to the same key slot (offset).
3948 * If this fails, remove the original as well.
3949 */
3950 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3951 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3952 sta) {
3953 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3954 key_offset, !mcast);
3955 if (ret) {
3956 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3957 goto end;
3958 }
3959 }
3960
3961 __set_bit(key_offset, mvm->fw_key_table);
3962
3963 end:
3964 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3965 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3966 sta ? sta->addr : zero_addr, ret);
3967 return ret;
3968 }
3969
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3970 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3971 struct ieee80211_vif *vif,
3972 struct ieee80211_sta *sta,
3973 struct ieee80211_key_conf *keyconf)
3974 {
3975 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3976 struct iwl_mvm_sta *mvm_sta;
3977 u8 sta_id = IWL_MVM_INVALID_STA;
3978 int ret, i;
3979
3980 lockdep_assert_held(&mvm->mutex);
3981
3982 /* Get the station from the mvm local station table */
3983 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3984 if (mvm_sta)
3985 sta_id = mvm_sta->deflink.sta_id;
3986 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3987 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id;
3988
3989
3990 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3991 keyconf->keyidx, sta_id);
3992
3993 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3994 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3995 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3996 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3997
3998 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3999 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
4000 keyconf->hw_key_idx);
4001 return -ENOENT;
4002 }
4003
4004 /* track which key was deleted last */
4005 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
4006 if (mvm->fw_key_deleted[i] < U8_MAX)
4007 mvm->fw_key_deleted[i]++;
4008 }
4009 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
4010
4011 if (sta && !mvm_sta) {
4012 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
4013 return 0;
4014 }
4015
4016 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
4017 if (ret)
4018 return ret;
4019
4020 /* delete WEP key twice to get rid of (now useless) offset */
4021 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4022 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
4023 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
4024
4025 return ret;
4026 }
4027
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)4028 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
4029 struct ieee80211_vif *vif,
4030 struct ieee80211_key_conf *keyconf,
4031 struct ieee80211_sta *sta, u32 iv32,
4032 u16 *phase1key)
4033 {
4034 struct iwl_mvm_sta *mvm_sta;
4035 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
4036 bool mfp = sta ? sta->mfp : false;
4037
4038 rcu_read_lock();
4039
4040 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
4041 if (WARN_ON_ONCE(!mvm_sta))
4042 goto unlock;
4043 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast,
4044 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
4045 mfp);
4046
4047 unlock:
4048 rcu_read_unlock();
4049 }
4050
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)4051 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
4052 struct ieee80211_sta *sta)
4053 {
4054 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4055 struct iwl_mvm_add_sta_cmd cmd = {
4056 .add_modify = STA_MODE_MODIFY,
4057 .sta_id = mvmsta->deflink.sta_id,
4058 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
4059 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4060 };
4061 int ret;
4062
4063 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4064 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4065 if (ret)
4066 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4067 }
4068
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)4069 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
4070 struct ieee80211_sta *sta,
4071 enum ieee80211_frame_release_type reason,
4072 u16 cnt, u16 tids, bool more_data,
4073 bool single_sta_queue)
4074 {
4075 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4076 struct iwl_mvm_add_sta_cmd cmd = {
4077 .add_modify = STA_MODE_MODIFY,
4078 .sta_id = mvmsta->deflink.sta_id,
4079 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
4080 .sleep_tx_count = cpu_to_le16(cnt),
4081 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4082 };
4083 int tid, ret;
4084 unsigned long _tids = tids;
4085
4086 /* convert TIDs to ACs - we don't support TSPEC so that's OK
4087 * Note that this field is reserved and unused by firmware not
4088 * supporting GO uAPSD, so it's safe to always do this.
4089 */
4090 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
4091 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
4092
4093 /* If we're releasing frames from aggregation or dqa queues then check
4094 * if all the queues that we're releasing frames from, combined, have:
4095 * - more frames than the service period, in which case more_data
4096 * needs to be set
4097 * - fewer than 'cnt' frames, in which case we need to adjust the
4098 * firmware command (but do that unconditionally)
4099 */
4100 if (single_sta_queue) {
4101 int remaining = cnt;
4102 int sleep_tx_count;
4103
4104 spin_lock_bh(&mvmsta->lock);
4105 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
4106 struct iwl_mvm_tid_data *tid_data;
4107 u16 n_queued;
4108
4109 tid_data = &mvmsta->tid_data[tid];
4110
4111 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
4112 if (n_queued > remaining) {
4113 more_data = true;
4114 remaining = 0;
4115 break;
4116 }
4117 remaining -= n_queued;
4118 }
4119 sleep_tx_count = cnt - remaining;
4120 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
4121 mvmsta->sleep_tx_count = sleep_tx_count;
4122 spin_unlock_bh(&mvmsta->lock);
4123
4124 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
4125 if (WARN_ON(cnt - remaining == 0)) {
4126 ieee80211_sta_eosp(sta);
4127 return;
4128 }
4129 }
4130
4131 /* Note: this is ignored by firmware not supporting GO uAPSD */
4132 if (more_data)
4133 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
4134
4135 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
4136 mvmsta->next_status_eosp = true;
4137 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
4138 } else {
4139 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
4140 }
4141
4142 /* block the Tx queues until the FW updated the sleep Tx count */
4143 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
4144 CMD_ASYNC | CMD_BLOCK_TXQS,
4145 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4146 if (ret)
4147 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4148 }
4149
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)4150 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
4151 struct iwl_rx_cmd_buffer *rxb)
4152 {
4153 struct iwl_rx_packet *pkt = rxb_addr(rxb);
4154 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
4155 struct ieee80211_sta *sta;
4156 u32 sta_id = le32_to_cpu(notif->sta_id);
4157
4158 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
4159 return;
4160
4161 rcu_read_lock();
4162 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
4163 if (!IS_ERR_OR_NULL(sta))
4164 ieee80211_sta_eosp(sta);
4165 rcu_read_unlock();
4166 }
4167
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)4168 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
4169 struct iwl_mvm_sta *mvmsta,
4170 bool disable)
4171 {
4172 struct iwl_mvm_add_sta_cmd cmd = {
4173 .add_modify = STA_MODE_MODIFY,
4174 .sta_id = mvmsta->deflink.sta_id,
4175 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4176 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4177 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4178 };
4179 int ret;
4180
4181 if (mvm->mld_api_is_used) {
4182 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4183 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable);
4184 return;
4185 }
4186
4187 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4188 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4189 if (ret)
4190 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4191 }
4192
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)4193 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
4194 struct ieee80211_sta *sta,
4195 bool disable)
4196 {
4197 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4198
4199 if (mvm->mld_api_is_used) {
4200 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4201 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable);
4202 return;
4203 }
4204
4205 spin_lock_bh(&mvm_sta->lock);
4206
4207 if (mvm_sta->disable_tx == disable) {
4208 spin_unlock_bh(&mvm_sta->lock);
4209 return;
4210 }
4211
4212 mvm_sta->disable_tx = disable;
4213
4214 /*
4215 * If sta PS state is handled by mac80211, tell it to start/stop
4216 * queuing tx for this station.
4217 */
4218 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4219 ieee80211_sta_block_awake(mvm->hw, sta, disable);
4220
4221 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4222
4223 spin_unlock_bh(&mvm_sta->lock);
4224 }
4225
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)4226 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4227 struct iwl_mvm_vif *mvmvif,
4228 struct iwl_mvm_int_sta *sta,
4229 bool disable)
4230 {
4231 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4232 struct iwl_mvm_add_sta_cmd cmd = {
4233 .add_modify = STA_MODE_MODIFY,
4234 .sta_id = sta->sta_id,
4235 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4236 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4237 .mac_id_n_color = cpu_to_le32(id),
4238 };
4239 int ret;
4240
4241 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4242 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4243 if (ret)
4244 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4245 }
4246
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)4247 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4248 struct iwl_mvm_vif *mvmvif,
4249 bool disable)
4250 {
4251 struct ieee80211_sta *sta;
4252 struct iwl_mvm_sta *mvm_sta;
4253 int i;
4254
4255 if (mvm->mld_api_is_used) {
4256 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4257 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif,
4258 disable);
4259 return;
4260 }
4261
4262 rcu_read_lock();
4263
4264 /* Block/unblock all the stations of the given mvmvif */
4265 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4266 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4267 if (IS_ERR_OR_NULL(sta))
4268 continue;
4269
4270 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4271 if (mvm_sta->mac_id_n_color !=
4272 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4273 continue;
4274
4275 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4276 }
4277
4278 rcu_read_unlock();
4279
4280 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4281 return;
4282
4283 /* Need to block/unblock also multicast station */
4284 if (mvmvif->deflink.mcast_sta.sta_id != IWL_MVM_INVALID_STA)
4285 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4286 &mvmvif->deflink.mcast_sta,
4287 disable);
4288
4289 /*
4290 * Only unblock the broadcast station (FW blocks it for immediate
4291 * quiet, not the driver)
4292 */
4293 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4294 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4295 &mvmvif->deflink.bcast_sta,
4296 disable);
4297 }
4298
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)4299 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4300 {
4301 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4302 struct iwl_mvm_sta *mvmsta;
4303
4304 rcu_read_lock();
4305
4306 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id);
4307
4308 if (mvmsta)
4309 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4310
4311 rcu_read_unlock();
4312 }
4313
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)4314 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4315 {
4316 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4317
4318 /*
4319 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4320 * to align the wrap around of ssn so we compare relevant values.
4321 */
4322 if (mvm->trans->trans_cfg->gen2)
4323 sn &= 0xff;
4324
4325 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4326 }
4327
4328 #if defined(__linux__)
iwl_mvm_add_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_int_sta * sta,u8 * addr,u32 cipher,u8 * key,u32 key_len,struct ieee80211_key_conf * keyconf)4329 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4330 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4331 u8 *key, u32 key_len,
4332 struct ieee80211_key_conf *keyconf)
4333 {
4334 int ret;
4335 u16 queue;
4336 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4337 unsigned int wdg_timeout =
4338 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
4339 bool mld = iwl_mvm_has_mld_api(mvm->fw);
4340 u32 type = mld ? STATION_TYPE_PEER : IWL_STA_LINK;
4341
4342 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4343 NL80211_IFTYPE_UNSPECIFIED, type);
4344 if (ret)
4345 return ret;
4346
4347 if (mld)
4348 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr,
4349 mvmvif->deflink.fw_link_id,
4350 &queue,
4351 IWL_MAX_TID_COUNT,
4352 &wdg_timeout);
4353 else
4354 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id,
4355 mvmvif->color, addr, sta,
4356 &queue,
4357 IWL_MVM_TX_FIFO_BE);
4358 if (ret)
4359 goto out;
4360
4361 keyconf->cipher = cipher;
4362 memcpy(keyconf->key, key, key_len);
4363 keyconf->keylen = key_len;
4364 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE;
4365
4366 if (mld) {
4367 /* The MFP flag is set according to the station mfp field. Since
4368 * we don't have a station, set it manually.
4369 */
4370 u32 key_flags =
4371 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) |
4372 IWL_SEC_KEY_FLAG_MFP;
4373 u32 sta_mask = BIT(sta->sta_id);
4374
4375 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf);
4376 } else {
4377 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4378 0, NULL, 0, 0, true);
4379 }
4380
4381 out:
4382 if (ret)
4383 iwl_mvm_dealloc_int_sta(mvm, sta);
4384 return ret;
4385 }
4386 #endif
4387
iwl_mvm_cancel_channel_switch(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id)4388 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4389 struct ieee80211_vif *vif,
4390 u32 id)
4391 {
4392 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4393 .id = cpu_to_le32(id),
4394 };
4395 int ret;
4396
4397 ret = iwl_mvm_send_cmd_pdu(mvm,
4398 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4399 CMD_ASYNC,
4400 sizeof(cancel_channel_switch_cmd),
4401 &cancel_channel_switch_cmd);
4402 if (ret)
4403 IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4404 }
4405
iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif * mvmvif,u8 fw_sta_id)4406 static int iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif *mvmvif,
4407 u8 fw_sta_id)
4408 {
4409 struct ieee80211_link_sta *link_sta =
4410 rcu_dereference(mvmvif->mvm->fw_id_to_link_sta[fw_sta_id]);
4411 struct iwl_mvm_vif_link_info *link;
4412
4413 if (WARN_ON_ONCE(!link_sta))
4414 return -EINVAL;
4415
4416 link = mvmvif->link[link_sta->link_id];
4417
4418 if (WARN_ON_ONCE(!link))
4419 return -EINVAL;
4420
4421 return link->fw_link_id;
4422 }
4423
4424 #define IWL_MVM_TPT_COUNT_WINDOW (IWL_MVM_TPT_COUNT_WINDOW_SEC * HZ)
4425
iwl_mvm_count_mpdu(struct iwl_mvm_sta * mvm_sta,u8 fw_sta_id,u32 count,bool tx,int queue)4426 void iwl_mvm_count_mpdu(struct iwl_mvm_sta *mvm_sta, u8 fw_sta_id, u32 count,
4427 bool tx, int queue)
4428 {
4429 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvm_sta->vif);
4430 struct iwl_mvm *mvm = mvmvif->mvm;
4431 struct iwl_mvm_tpt_counter *queue_counter;
4432 struct iwl_mvm_mpdu_counter *link_counter;
4433 u32 total_mpdus = 0;
4434 int fw_link_id;
4435
4436 /* Count only for a BSS sta, and only when EMLSR is possible */
4437 if (!mvm_sta->mpdu_counters)
4438 return;
4439
4440 /* Map sta id to link id */
4441 fw_link_id = iwl_mvm_fw_sta_id_to_fw_link_id(mvmvif, fw_sta_id);
4442 if (fw_link_id < 0)
4443 return;
4444
4445 queue_counter = &mvm_sta->mpdu_counters[queue];
4446 link_counter = &queue_counter->per_link[fw_link_id];
4447
4448 spin_lock_bh(&queue_counter->lock);
4449
4450 if (tx)
4451 link_counter->tx += count;
4452 else
4453 link_counter->rx += count;
4454
4455 /*
4456 * When not in EMLSR, the window and the decision to enter EMLSR are
4457 * handled during counting, when in EMLSR - in the statistics flow
4458 */
4459 if (mvmvif->esr_active)
4460 goto out;
4461
4462 if (time_is_before_jiffies(queue_counter->window_start +
4463 IWL_MVM_TPT_COUNT_WINDOW)) {
4464 memset(queue_counter->per_link, 0,
4465 sizeof(queue_counter->per_link));
4466 queue_counter->window_start = jiffies;
4467
4468 IWL_DEBUG_STATS(mvm, "MPDU counters are cleared\n");
4469 }
4470
4471 for (int i = 0; i < IWL_MVM_FW_MAX_LINK_ID; i++)
4472 total_mpdus += tx ? queue_counter->per_link[i].tx :
4473 queue_counter->per_link[i].rx;
4474
4475 if (total_mpdus > IWL_MVM_ENTER_ESR_TPT_THRESH)
4476 wiphy_work_queue(mvmvif->mvm->hw->wiphy,
4477 &mvmvif->unblock_esr_tpt_wk);
4478
4479 out:
4480 spin_unlock_bh(&queue_counter->lock);
4481 }
4482