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1 | /****************************************************************************** | |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
8 | * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. | |
9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH | |
10 | * Copyright(c) 2016 Intel Deutschland GmbH | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of version 2 of the GNU General Public License as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
24 | * USA | |
25 | * | |
26 | * The full GNU General Public License is included in this distribution | |
27 | * in the file called COPYING. | |
28 | * | |
29 | * Contact Information: | |
30 | * Intel Linux Wireless <linuxwifi@intel.com> | |
31 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
32 | * | |
33 | * BSD LICENSE | |
34 | * | |
35 | * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. | |
36 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH | |
37 | * Copyright(c) 2016 Intel Deutschland GmbH | |
38 | * All rights reserved. | |
39 | * | |
40 | * Redistribution and use in source and binary forms, with or without | |
41 | * modification, are permitted provided that the following conditions | |
42 | * are met: | |
43 | * | |
44 | * * Redistributions of source code must retain the above copyright | |
45 | * notice, this list of conditions and the following disclaimer. | |
46 | * * Redistributions in binary form must reproduce the above copyright | |
47 | * notice, this list of conditions and the following disclaimer in | |
48 | * the documentation and/or other materials provided with the | |
49 | * distribution. | |
50 | * * Neither the name Intel Corporation nor the names of its | |
51 | * contributors may be used to endorse or promote products derived | |
52 | * from this software without specific prior written permission. | |
53 | * | |
54 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
55 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
56 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
57 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
58 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
59 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
60 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
61 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
62 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
63 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
64 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
65 | * | |
66 | *****************************************************************************/ | |
67 | #include <net/mac80211.h> | |
68 | ||
69 | #include "mvm.h" | |
70 | #include "sta.h" | |
71 | #include "rs.h" | |
72 | ||
73 | /* | |
74 | * New version of ADD_STA_sta command added new fields at the end of the | |
75 | * structure, so sending the size of the relevant API's structure is enough to | |
76 | * support both API versions. | |
77 | */ | |
78 | static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm) | |
79 | { | |
80 | return iwl_mvm_has_new_rx_api(mvm) ? | |
81 | sizeof(struct iwl_mvm_add_sta_cmd) : | |
82 | sizeof(struct iwl_mvm_add_sta_cmd_v7); | |
83 | } | |
84 | ||
85 | static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, | |
86 | enum nl80211_iftype iftype) | |
87 | { | |
88 | int sta_id; | |
89 | u32 reserved_ids = 0; | |
90 | ||
91 | BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); | |
92 | WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); | |
93 | ||
94 | lockdep_assert_held(&mvm->mutex); | |
95 | ||
96 | /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ | |
97 | if (iftype != NL80211_IFTYPE_STATION) | |
98 | reserved_ids = BIT(0); | |
99 | ||
100 | /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ | |
101 | for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { | |
102 | if (BIT(sta_id) & reserved_ids) | |
103 | continue; | |
104 | ||
105 | if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
106 | lockdep_is_held(&mvm->mutex))) | |
107 | return sta_id; | |
108 | } | |
109 | return IWL_MVM_STATION_COUNT; | |
110 | } | |
111 | ||
112 | /* send station add/update command to firmware */ | |
113 | int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
114 | bool update, unsigned int flags) | |
115 | { | |
116 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
117 | struct iwl_mvm_add_sta_cmd add_sta_cmd = { | |
118 | .sta_id = mvm_sta->sta_id, | |
119 | .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), | |
120 | .add_modify = update ? 1 : 0, | |
121 | .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | | |
122 | STA_FLG_MIMO_EN_MSK), | |
123 | .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg), | |
124 | }; | |
125 | int ret; | |
126 | u32 status; | |
127 | u32 agg_size = 0, mpdu_dens = 0; | |
128 | ||
129 | if (!update || (flags & STA_MODIFY_QUEUES)) { | |
130 | add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
131 | memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); | |
132 | ||
133 | if (flags & STA_MODIFY_QUEUES) | |
134 | add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES; | |
135 | } | |
136 | ||
137 | switch (sta->bandwidth) { | |
138 | case IEEE80211_STA_RX_BW_160: | |
139 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); | |
140 | /* fall through */ | |
141 | case IEEE80211_STA_RX_BW_80: | |
142 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); | |
143 | /* fall through */ | |
144 | case IEEE80211_STA_RX_BW_40: | |
145 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); | |
146 | /* fall through */ | |
147 | case IEEE80211_STA_RX_BW_20: | |
148 | if (sta->ht_cap.ht_supported) | |
149 | add_sta_cmd.station_flags |= | |
150 | cpu_to_le32(STA_FLG_FAT_EN_20MHZ); | |
151 | break; | |
152 | } | |
153 | ||
154 | switch (sta->rx_nss) { | |
155 | case 1: | |
156 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
157 | break; | |
158 | case 2: | |
159 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); | |
160 | break; | |
161 | case 3 ... 8: | |
162 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); | |
163 | break; | |
164 | } | |
165 | ||
166 | switch (sta->smps_mode) { | |
167 | case IEEE80211_SMPS_AUTOMATIC: | |
168 | case IEEE80211_SMPS_NUM_MODES: | |
169 | WARN_ON(1); | |
170 | break; | |
171 | case IEEE80211_SMPS_STATIC: | |
172 | /* override NSS */ | |
173 | add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); | |
174 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
175 | break; | |
176 | case IEEE80211_SMPS_DYNAMIC: | |
177 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); | |
178 | break; | |
179 | case IEEE80211_SMPS_OFF: | |
180 | /* nothing */ | |
181 | break; | |
182 | } | |
183 | ||
184 | if (sta->ht_cap.ht_supported) { | |
185 | add_sta_cmd.station_flags_msk |= | |
186 | cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | | |
187 | STA_FLG_AGG_MPDU_DENS_MSK); | |
188 | ||
189 | mpdu_dens = sta->ht_cap.ampdu_density; | |
190 | } | |
191 | ||
192 | if (sta->vht_cap.vht_supported) { | |
193 | agg_size = sta->vht_cap.cap & | |
194 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
195 | agg_size >>= | |
196 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
197 | } else if (sta->ht_cap.ht_supported) { | |
198 | agg_size = sta->ht_cap.ampdu_factor; | |
199 | } | |
200 | ||
201 | add_sta_cmd.station_flags |= | |
202 | cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); | |
203 | add_sta_cmd.station_flags |= | |
204 | cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); | |
205 | ||
206 | status = ADD_STA_SUCCESS; | |
207 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, | |
208 | iwl_mvm_add_sta_cmd_size(mvm), | |
209 | &add_sta_cmd, &status); | |
210 | if (ret) | |
211 | return ret; | |
212 | ||
213 | switch (status & IWL_ADD_STA_STATUS_MASK) { | |
214 | case ADD_STA_SUCCESS: | |
215 | IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); | |
216 | break; | |
217 | default: | |
218 | ret = -EIO; | |
219 | IWL_ERR(mvm, "ADD_STA failed\n"); | |
220 | break; | |
221 | } | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | static void iwl_mvm_rx_agg_session_expired(unsigned long data) | |
227 | { | |
228 | struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data; | |
229 | struct iwl_mvm_baid_data *ba_data; | |
230 | struct ieee80211_sta *sta; | |
231 | struct iwl_mvm_sta *mvm_sta; | |
232 | unsigned long timeout; | |
233 | ||
234 | rcu_read_lock(); | |
235 | ||
236 | ba_data = rcu_dereference(*rcu_ptr); | |
237 | ||
238 | if (WARN_ON(!ba_data)) | |
239 | goto unlock; | |
240 | ||
241 | if (!ba_data->timeout) | |
242 | goto unlock; | |
243 | ||
244 | timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2); | |
245 | if (time_is_after_jiffies(timeout)) { | |
246 | mod_timer(&ba_data->session_timer, timeout); | |
247 | goto unlock; | |
248 | } | |
249 | ||
250 | /* Timer expired */ | |
251 | sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]); | |
252 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
253 | ieee80211_stop_rx_ba_session_offl(mvm_sta->vif, | |
254 | sta->addr, ba_data->tid); | |
255 | unlock: | |
256 | rcu_read_unlock(); | |
257 | } | |
258 | ||
259 | static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, | |
260 | struct ieee80211_sta *sta) | |
261 | { | |
262 | unsigned long used_hw_queues; | |
263 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
264 | unsigned int wdg_timeout = | |
265 | iwl_mvm_get_wd_timeout(mvm, NULL, true, false); | |
266 | u32 ac; | |
267 | ||
268 | lockdep_assert_held(&mvm->mutex); | |
269 | ||
270 | used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); | |
271 | ||
272 | /* Find available queues, and allocate them to the ACs */ | |
273 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
274 | u8 queue = find_first_zero_bit(&used_hw_queues, | |
275 | mvm->first_agg_queue); | |
276 | ||
277 | if (queue >= mvm->first_agg_queue) { | |
278 | IWL_ERR(mvm, "Failed to allocate STA queue\n"); | |
279 | return -EBUSY; | |
280 | } | |
281 | ||
282 | __set_bit(queue, &used_hw_queues); | |
283 | mvmsta->hw_queue[ac] = queue; | |
284 | } | |
285 | ||
286 | /* Found a place for all queues - enable them */ | |
287 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
288 | iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], | |
289 | mvmsta->hw_queue[ac], | |
290 | iwl_mvm_ac_to_tx_fifo[ac], 0, | |
291 | wdg_timeout); | |
292 | mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); | |
293 | } | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, | |
299 | struct ieee80211_sta *sta) | |
300 | { | |
301 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
302 | unsigned long sta_msk; | |
303 | int i; | |
304 | ||
305 | lockdep_assert_held(&mvm->mutex); | |
306 | ||
307 | /* disable the TDLS STA-specific queues */ | |
308 | sta_msk = mvmsta->tfd_queue_msk; | |
309 | for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) | |
310 | iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0); | |
311 | } | |
312 | ||
313 | /* Disable aggregations for a bitmap of TIDs for a given station */ | |
314 | static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue, | |
315 | unsigned long disable_agg_tids, | |
316 | bool remove_queue) | |
317 | { | |
318 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
319 | struct ieee80211_sta *sta; | |
320 | struct iwl_mvm_sta *mvmsta; | |
321 | u32 status; | |
322 | u8 sta_id; | |
323 | int ret; | |
324 | ||
325 | spin_lock_bh(&mvm->queue_info_lock); | |
326 | sta_id = mvm->queue_info[queue].ra_sta_id; | |
327 | spin_unlock_bh(&mvm->queue_info_lock); | |
328 | ||
329 | rcu_read_lock(); | |
330 | ||
331 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
332 | ||
333 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
334 | rcu_read_unlock(); | |
335 | return -EINVAL; | |
336 | } | |
337 | ||
338 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
339 | ||
340 | mvmsta->tid_disable_agg |= disable_agg_tids; | |
341 | ||
342 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
343 | cmd.sta_id = mvmsta->sta_id; | |
344 | cmd.add_modify = STA_MODE_MODIFY; | |
345 | cmd.modify_mask = STA_MODIFY_QUEUES; | |
346 | if (disable_agg_tids) | |
347 | cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX; | |
348 | if (remove_queue) | |
349 | cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL; | |
350 | cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); | |
351 | cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); | |
352 | ||
353 | rcu_read_unlock(); | |
354 | ||
355 | /* Notify FW of queue removal from the STA queues */ | |
356 | status = ADD_STA_SUCCESS; | |
357 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, | |
358 | iwl_mvm_add_sta_cmd_size(mvm), | |
359 | &cmd, &status); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue) | |
365 | { | |
366 | struct ieee80211_sta *sta; | |
367 | struct iwl_mvm_sta *mvmsta; | |
368 | unsigned long tid_bitmap; | |
369 | unsigned long agg_tids = 0; | |
370 | s8 sta_id; | |
371 | int tid; | |
372 | ||
373 | lockdep_assert_held(&mvm->mutex); | |
374 | ||
375 | spin_lock_bh(&mvm->queue_info_lock); | |
376 | sta_id = mvm->queue_info[queue].ra_sta_id; | |
377 | tid_bitmap = mvm->queue_info[queue].tid_bitmap; | |
378 | spin_unlock_bh(&mvm->queue_info_lock); | |
379 | ||
380 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
381 | lockdep_is_held(&mvm->mutex)); | |
382 | ||
383 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) | |
384 | return -EINVAL; | |
385 | ||
386 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
387 | ||
388 | spin_lock_bh(&mvmsta->lock); | |
389 | for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { | |
390 | if (mvmsta->tid_data[tid].state == IWL_AGG_ON) | |
391 | agg_tids |= BIT(tid); | |
392 | } | |
393 | spin_unlock_bh(&mvmsta->lock); | |
394 | ||
395 | return agg_tids; | |
396 | } | |
397 | ||
398 | /* | |
399 | * Remove a queue from a station's resources. | |
400 | * Note that this only marks as free. It DOESN'T delete a BA agreement, and | |
401 | * doesn't disable the queue | |
402 | */ | |
403 | static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue) | |
404 | { | |
405 | struct ieee80211_sta *sta; | |
406 | struct iwl_mvm_sta *mvmsta; | |
407 | unsigned long tid_bitmap; | |
408 | unsigned long disable_agg_tids = 0; | |
409 | u8 sta_id; | |
410 | int tid; | |
411 | ||
412 | lockdep_assert_held(&mvm->mutex); | |
413 | ||
414 | spin_lock_bh(&mvm->queue_info_lock); | |
415 | sta_id = mvm->queue_info[queue].ra_sta_id; | |
416 | tid_bitmap = mvm->queue_info[queue].tid_bitmap; | |
417 | spin_unlock_bh(&mvm->queue_info_lock); | |
418 | ||
419 | rcu_read_lock(); | |
420 | ||
421 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
422 | ||
423 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
424 | rcu_read_unlock(); | |
425 | return 0; | |
426 | } | |
427 | ||
428 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
429 | ||
430 | spin_lock_bh(&mvmsta->lock); | |
431 | /* Unmap MAC queues and TIDs from this queue */ | |
432 | for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) { | |
433 | if (mvmsta->tid_data[tid].state == IWL_AGG_ON) | |
434 | disable_agg_tids |= BIT(tid); | |
435 | mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE; | |
436 | } | |
437 | ||
438 | mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */ | |
439 | spin_unlock_bh(&mvmsta->lock); | |
440 | ||
441 | rcu_read_unlock(); | |
442 | ||
443 | spin_lock_bh(&mvm->queue_info_lock); | |
444 | /* Unmap MAC queues and TIDs from this queue */ | |
445 | mvm->queue_info[queue].hw_queue_to_mac80211 = 0; | |
446 | mvm->queue_info[queue].hw_queue_refcount = 0; | |
447 | mvm->queue_info[queue].tid_bitmap = 0; | |
448 | spin_unlock_bh(&mvm->queue_info_lock); | |
449 | ||
450 | return disable_agg_tids; | |
451 | } | |
452 | ||
453 | static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm, | |
454 | unsigned long tfd_queue_mask, u8 ac) | |
455 | { | |
456 | int queue = 0; | |
457 | u8 ac_to_queue[IEEE80211_NUM_ACS]; | |
458 | int i; | |
459 | ||
460 | lockdep_assert_held(&mvm->queue_info_lock); | |
461 | ||
462 | memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue)); | |
463 | ||
464 | /* See what ACs the existing queues for this STA have */ | |
465 | for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) { | |
466 | /* Only DATA queues can be shared */ | |
467 | if (i < IWL_MVM_DQA_MIN_DATA_QUEUE && | |
468 | i != IWL_MVM_DQA_BSS_CLIENT_QUEUE) | |
469 | continue; | |
470 | ||
471 | /* Don't try and take queues being reconfigured */ | |
472 | if (mvm->queue_info[queue].status == | |
473 | IWL_MVM_QUEUE_RECONFIGURING) | |
474 | continue; | |
475 | ||
476 | ac_to_queue[mvm->queue_info[i].mac80211_ac] = i; | |
477 | } | |
478 | ||
479 | /* | |
480 | * The queue to share is chosen only from DATA queues as follows (in | |
481 | * descending priority): | |
482 | * 1. An AC_BE queue | |
483 | * 2. Same AC queue | |
484 | * 3. Highest AC queue that is lower than new AC | |
485 | * 4. Any existing AC (there always is at least 1 DATA queue) | |
486 | */ | |
487 | ||
488 | /* Priority 1: An AC_BE queue */ | |
489 | if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE) | |
490 | queue = ac_to_queue[IEEE80211_AC_BE]; | |
491 | /* Priority 2: Same AC queue */ | |
492 | else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE) | |
493 | queue = ac_to_queue[ac]; | |
494 | /* Priority 3a: If new AC is VO and VI exists - use VI */ | |
495 | else if (ac == IEEE80211_AC_VO && | |
496 | ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) | |
497 | queue = ac_to_queue[IEEE80211_AC_VI]; | |
498 | /* Priority 3b: No BE so only AC less than the new one is BK */ | |
499 | else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE) | |
500 | queue = ac_to_queue[IEEE80211_AC_BK]; | |
501 | /* Priority 4a: No BE nor BK - use VI if exists */ | |
502 | else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE) | |
503 | queue = ac_to_queue[IEEE80211_AC_VI]; | |
504 | /* Priority 4b: No BE, BK nor VI - use VO if exists */ | |
505 | else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE) | |
506 | queue = ac_to_queue[IEEE80211_AC_VO]; | |
507 | ||
508 | /* Make sure queue found (or not) is legal */ | |
509 | if (!iwl_mvm_is_dqa_data_queue(mvm, queue) && | |
510 | !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) && | |
511 | (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) { | |
512 | IWL_ERR(mvm, "No DATA queues available to share\n"); | |
513 | return -ENOSPC; | |
514 | } | |
515 | ||
516 | /* Make sure the queue isn't in the middle of being reconfigured */ | |
517 | if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) { | |
518 | IWL_ERR(mvm, | |
519 | "TXQ %d is in the middle of re-config - try again\n", | |
520 | queue); | |
521 | return -EBUSY; | |
522 | } | |
523 | ||
524 | return queue; | |
525 | } | |
526 | ||
527 | /* | |
528 | * If a given queue has a higher AC than the TID stream that is being compared | |
529 | * to, the queue needs to be redirected to the lower AC. This function does that | |
530 | * in such a case, otherwise - if no redirection required - it does nothing, | |
531 | * unless the %force param is true. | |
532 | */ | |
533 | int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid, | |
534 | int ac, int ssn, unsigned int wdg_timeout, | |
535 | bool force) | |
536 | { | |
537 | struct iwl_scd_txq_cfg_cmd cmd = { | |
538 | .scd_queue = queue, | |
539 | .action = SCD_CFG_DISABLE_QUEUE, | |
540 | }; | |
541 | bool shared_queue; | |
542 | unsigned long mq; | |
543 | int ret; | |
544 | ||
545 | /* | |
546 | * If the AC is lower than current one - FIFO needs to be redirected to | |
547 | * the lowest one of the streams in the queue. Check if this is needed | |
548 | * here. | |
549 | * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with | |
550 | * value 3 and VO with value 0, so to check if ac X is lower than ac Y | |
551 | * we need to check if the numerical value of X is LARGER than of Y. | |
552 | */ | |
553 | spin_lock_bh(&mvm->queue_info_lock); | |
554 | if (ac <= mvm->queue_info[queue].mac80211_ac && !force) { | |
555 | spin_unlock_bh(&mvm->queue_info_lock); | |
556 | ||
557 | IWL_DEBUG_TX_QUEUES(mvm, | |
558 | "No redirection needed on TXQ #%d\n", | |
559 | queue); | |
560 | return 0; | |
561 | } | |
562 | ||
563 | cmd.sta_id = mvm->queue_info[queue].ra_sta_id; | |
564 | cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac]; | |
565 | cmd.tid = mvm->queue_info[queue].txq_tid; | |
566 | mq = mvm->queue_info[queue].hw_queue_to_mac80211; | |
567 | shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1); | |
568 | spin_unlock_bh(&mvm->queue_info_lock); | |
569 | ||
570 | IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n", | |
571 | queue, iwl_mvm_ac_to_tx_fifo[ac]); | |
572 | ||
573 | /* Stop MAC queues and wait for this queue to empty */ | |
574 | iwl_mvm_stop_mac_queues(mvm, mq); | |
575 | ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue)); | |
576 | if (ret) { | |
577 | IWL_ERR(mvm, "Error draining queue %d before reconfig\n", | |
578 | queue); | |
579 | ret = -EIO; | |
580 | goto out; | |
581 | } | |
582 | ||
583 | /* Before redirecting the queue we need to de-activate it */ | |
584 | iwl_trans_txq_disable(mvm->trans, queue, false); | |
585 | ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd); | |
586 | if (ret) | |
587 | IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue, | |
588 | ret); | |
589 | ||
590 | /* Make sure the SCD wrptr is correctly set before reconfiguring */ | |
591 | iwl_trans_txq_enable(mvm->trans, queue, iwl_mvm_ac_to_tx_fifo[ac], | |
592 | cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, | |
593 | ssn, wdg_timeout); | |
594 | ||
595 | /* Update the TID "owner" of the queue */ | |
596 | spin_lock_bh(&mvm->queue_info_lock); | |
597 | mvm->queue_info[queue].txq_tid = tid; | |
598 | spin_unlock_bh(&mvm->queue_info_lock); | |
599 | ||
600 | /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */ | |
601 | ||
602 | /* Redirect to lower AC */ | |
603 | iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac], | |
604 | cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF, | |
605 | ssn); | |
606 | ||
607 | /* Update AC marking of the queue */ | |
608 | spin_lock_bh(&mvm->queue_info_lock); | |
609 | mvm->queue_info[queue].mac80211_ac = ac; | |
610 | spin_unlock_bh(&mvm->queue_info_lock); | |
611 | ||
612 | /* | |
613 | * Mark queue as shared in transport if shared | |
614 | * Note this has to be done after queue enablement because enablement | |
615 | * can also set this value, and there is no indication there to shared | |
616 | * queues | |
617 | */ | |
618 | if (shared_queue) | |
619 | iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); | |
620 | ||
621 | out: | |
622 | /* Continue using the MAC queues */ | |
623 | iwl_mvm_start_mac_queues(mvm, mq); | |
624 | ||
625 | return ret; | |
626 | } | |
627 | ||
628 | static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm, | |
629 | struct ieee80211_sta *sta, u8 ac, int tid, | |
630 | struct ieee80211_hdr *hdr) | |
631 | { | |
632 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
633 | struct iwl_trans_txq_scd_cfg cfg = { | |
634 | .fifo = iwl_mvm_ac_to_tx_fifo[ac], | |
635 | .sta_id = mvmsta->sta_id, | |
636 | .tid = tid, | |
637 | .frame_limit = IWL_FRAME_LIMIT, | |
638 | }; | |
639 | unsigned int wdg_timeout = | |
640 | iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); | |
641 | u8 mac_queue = mvmsta->vif->hw_queue[ac]; | |
642 | int queue = -1; | |
643 | bool using_inactive_queue = false; | |
644 | unsigned long disable_agg_tids = 0; | |
645 | enum iwl_mvm_agg_state queue_state; | |
646 | bool shared_queue = false; | |
647 | int ssn; | |
648 | unsigned long tfd_queue_mask; | |
649 | int ret; | |
650 | ||
651 | lockdep_assert_held(&mvm->mutex); | |
652 | ||
653 | spin_lock_bh(&mvmsta->lock); | |
654 | tfd_queue_mask = mvmsta->tfd_queue_msk; | |
655 | spin_unlock_bh(&mvmsta->lock); | |
656 | ||
657 | spin_lock_bh(&mvm->queue_info_lock); | |
658 | ||
659 | /* | |
660 | * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one | |
661 | * exists | |
662 | */ | |
663 | if (!ieee80211_is_data_qos(hdr->frame_control) || | |
664 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
665 | queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, | |
666 | IWL_MVM_DQA_MIN_MGMT_QUEUE, | |
667 | IWL_MVM_DQA_MAX_MGMT_QUEUE); | |
668 | if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE) | |
669 | IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n", | |
670 | queue); | |
671 | ||
672 | /* If no such queue is found, we'll use a DATA queue instead */ | |
673 | } | |
674 | ||
675 | if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) && | |
676 | (mvm->queue_info[mvmsta->reserved_queue].status == | |
677 | IWL_MVM_QUEUE_RESERVED || | |
678 | mvm->queue_info[mvmsta->reserved_queue].status == | |
679 | IWL_MVM_QUEUE_INACTIVE)) { | |
680 | queue = mvmsta->reserved_queue; | |
681 | mvm->queue_info[queue].reserved = true; | |
682 | IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue); | |
683 | } | |
684 | ||
685 | if (queue < 0) | |
686 | queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, | |
687 | IWL_MVM_DQA_MIN_DATA_QUEUE, | |
688 | IWL_MVM_DQA_MAX_DATA_QUEUE); | |
689 | ||
690 | /* | |
691 | * Check if this queue is already allocated but inactive. | |
692 | * In such a case, we'll need to first free this queue before enabling | |
693 | * it again, so we'll mark it as reserved to make sure no new traffic | |
694 | * arrives on it | |
695 | */ | |
696 | if (queue > 0 && | |
697 | mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) { | |
698 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; | |
699 | using_inactive_queue = true; | |
700 | IWL_DEBUG_TX_QUEUES(mvm, | |
701 | "Re-assigning TXQ %d: sta_id=%d, tid=%d\n", | |
702 | queue, mvmsta->sta_id, tid); | |
703 | } | |
704 | ||
705 | /* No free queue - we'll have to share */ | |
706 | if (queue <= 0) { | |
707 | queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac); | |
708 | if (queue > 0) { | |
709 | shared_queue = true; | |
710 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED; | |
711 | } | |
712 | } | |
713 | ||
714 | /* | |
715 | * Mark TXQ as ready, even though it hasn't been fully configured yet, | |
716 | * to make sure no one else takes it. | |
717 | * This will allow avoiding re-acquiring the lock at the end of the | |
718 | * configuration. On error we'll mark it back as free. | |
719 | */ | |
720 | if ((queue > 0) && !shared_queue) | |
721 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; | |
722 | ||
723 | spin_unlock_bh(&mvm->queue_info_lock); | |
724 | ||
725 | /* This shouldn't happen - out of queues */ | |
726 | if (WARN_ON(queue <= 0)) { | |
727 | IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n", | |
728 | tid, cfg.sta_id); | |
729 | return queue; | |
730 | } | |
731 | ||
732 | /* | |
733 | * Actual en/disablement of aggregations is through the ADD_STA HCMD, | |
734 | * but for configuring the SCD to send A-MPDUs we need to mark the queue | |
735 | * as aggregatable. | |
736 | * Mark all DATA queues as allowing to be aggregated at some point | |
737 | */ | |
738 | cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE || | |
739 | queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE); | |
740 | ||
741 | /* | |
742 | * If this queue was previously inactive (idle) - we need to free it | |
743 | * first | |
744 | */ | |
745 | if (using_inactive_queue) { | |
746 | struct iwl_scd_txq_cfg_cmd cmd = { | |
747 | .scd_queue = queue, | |
748 | .action = SCD_CFG_DISABLE_QUEUE, | |
749 | }; | |
750 | u8 ac; | |
751 | ||
752 | disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); | |
753 | ||
754 | spin_lock_bh(&mvm->queue_info_lock); | |
755 | ac = mvm->queue_info[queue].mac80211_ac; | |
756 | cmd.sta_id = mvm->queue_info[queue].ra_sta_id; | |
757 | cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[ac]; | |
758 | cmd.tid = mvm->queue_info[queue].txq_tid; | |
759 | spin_unlock_bh(&mvm->queue_info_lock); | |
760 | ||
761 | /* Disable the queue */ | |
762 | if (disable_agg_tids) | |
763 | iwl_mvm_invalidate_sta_queue(mvm, queue, | |
764 | disable_agg_tids, false); | |
765 | iwl_trans_txq_disable(mvm->trans, queue, false); | |
766 | ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), | |
767 | &cmd); | |
768 | if (ret) { | |
769 | IWL_ERR(mvm, | |
770 | "Failed to free inactive queue %d (ret=%d)\n", | |
771 | queue, ret); | |
772 | ||
773 | /* Re-mark the inactive queue as inactive */ | |
774 | spin_lock_bh(&mvm->queue_info_lock); | |
775 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE; | |
776 | spin_unlock_bh(&mvm->queue_info_lock); | |
777 | ||
778 | return ret; | |
779 | } | |
780 | ||
781 | /* If TXQ is allocated to another STA, update removal in FW */ | |
782 | if (cmd.sta_id != mvmsta->sta_id) | |
783 | iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true); | |
784 | } | |
785 | ||
786 | IWL_DEBUG_TX_QUEUES(mvm, | |
787 | "Allocating %squeue #%d to sta %d on tid %d\n", | |
788 | shared_queue ? "shared " : "", queue, | |
789 | mvmsta->sta_id, tid); | |
790 | ||
791 | if (shared_queue) { | |
792 | /* Disable any open aggs on this queue */ | |
793 | disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue); | |
794 | ||
795 | if (disable_agg_tids) { | |
796 | IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n", | |
797 | queue); | |
798 | iwl_mvm_invalidate_sta_queue(mvm, queue, | |
799 | disable_agg_tids, false); | |
800 | } | |
801 | } | |
802 | ||
803 | ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)); | |
804 | iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg, | |
805 | wdg_timeout); | |
806 | ||
807 | /* | |
808 | * Mark queue as shared in transport if shared | |
809 | * Note this has to be done after queue enablement because enablement | |
810 | * can also set this value, and there is no indication there to shared | |
811 | * queues | |
812 | */ | |
813 | if (shared_queue) | |
814 | iwl_trans_txq_set_shared_mode(mvm->trans, queue, true); | |
815 | ||
816 | spin_lock_bh(&mvmsta->lock); | |
817 | mvmsta->tid_data[tid].txq_id = queue; | |
818 | mvmsta->tid_data[tid].is_tid_active = true; | |
819 | mvmsta->tfd_queue_msk |= BIT(queue); | |
820 | queue_state = mvmsta->tid_data[tid].state; | |
821 | ||
822 | if (mvmsta->reserved_queue == queue) | |
823 | mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE; | |
824 | spin_unlock_bh(&mvmsta->lock); | |
825 | ||
826 | if (!shared_queue) { | |
827 | ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES); | |
828 | if (ret) | |
829 | goto out_err; | |
830 | ||
831 | /* If we need to re-enable aggregations... */ | |
832 | if (queue_state == IWL_AGG_ON) { | |
833 | ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); | |
834 | if (ret) | |
835 | goto out_err; | |
836 | } | |
837 | } else { | |
838 | /* Redirect queue, if needed */ | |
839 | ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn, | |
840 | wdg_timeout, false); | |
841 | if (ret) | |
842 | goto out_err; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | ||
847 | out_err: | |
848 | iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0); | |
849 | ||
850 | return ret; | |
851 | } | |
852 | ||
853 | static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue) | |
854 | { | |
855 | struct ieee80211_sta *sta; | |
856 | struct iwl_mvm_sta *mvmsta; | |
857 | s8 sta_id; | |
858 | int tid = -1; | |
859 | unsigned long tid_bitmap; | |
860 | unsigned int wdg_timeout; | |
861 | int ssn; | |
862 | int ret = true; | |
863 | ||
864 | lockdep_assert_held(&mvm->mutex); | |
865 | ||
866 | spin_lock_bh(&mvm->queue_info_lock); | |
867 | sta_id = mvm->queue_info[queue].ra_sta_id; | |
868 | tid_bitmap = mvm->queue_info[queue].tid_bitmap; | |
869 | spin_unlock_bh(&mvm->queue_info_lock); | |
870 | ||
871 | /* Find TID for queue, and make sure it is the only one on the queue */ | |
872 | tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1); | |
873 | if (tid_bitmap != BIT(tid)) { | |
874 | IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n", | |
875 | queue, tid_bitmap); | |
876 | return; | |
877 | } | |
878 | ||
879 | IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue, | |
880 | tid); | |
881 | ||
882 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
883 | lockdep_is_held(&mvm->mutex)); | |
884 | ||
885 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) | |
886 | return; | |
887 | ||
888 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
889 | wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false); | |
890 | ||
891 | ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number); | |
892 | ||
893 | ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, | |
894 | tid_to_mac80211_ac[tid], ssn, | |
895 | wdg_timeout, true); | |
896 | if (ret) { | |
897 | IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue); | |
898 | return; | |
899 | } | |
900 | ||
901 | /* If aggs should be turned back on - do it */ | |
902 | if (mvmsta->tid_data[tid].state == IWL_AGG_ON) { | |
903 | struct iwl_mvm_add_sta_cmd cmd; | |
904 | ||
905 | mvmsta->tid_disable_agg &= ~BIT(tid); | |
906 | ||
907 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
908 | cmd.sta_id = mvmsta->sta_id; | |
909 | cmd.add_modify = STA_MODE_MODIFY; | |
910 | cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX; | |
911 | cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk); | |
912 | cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg); | |
913 | ||
914 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, | |
915 | iwl_mvm_add_sta_cmd_size(mvm), &cmd); | |
916 | if (!ret) { | |
917 | IWL_DEBUG_TX_QUEUES(mvm, | |
918 | "TXQ #%d is now aggregated again\n", | |
919 | queue); | |
920 | ||
921 | /* Mark queue intenally as aggregating again */ | |
922 | iwl_trans_txq_set_shared_mode(mvm->trans, queue, false); | |
923 | } | |
924 | } | |
925 | ||
926 | spin_lock_bh(&mvm->queue_info_lock); | |
927 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; | |
928 | spin_unlock_bh(&mvm->queue_info_lock); | |
929 | } | |
930 | ||
931 | static inline u8 iwl_mvm_tid_to_ac_queue(int tid) | |
932 | { | |
933 | if (tid == IWL_MAX_TID_COUNT) | |
934 | return IEEE80211_AC_VO; /* MGMT */ | |
935 | ||
936 | return tid_to_mac80211_ac[tid]; | |
937 | } | |
938 | ||
939 | static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm, | |
940 | struct ieee80211_sta *sta, int tid) | |
941 | { | |
942 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
943 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
944 | struct sk_buff *skb; | |
945 | struct ieee80211_hdr *hdr; | |
946 | struct sk_buff_head deferred_tx; | |
947 | u8 mac_queue; | |
948 | bool no_queue = false; /* Marks if there is a problem with the queue */ | |
949 | u8 ac; | |
950 | ||
951 | lockdep_assert_held(&mvm->mutex); | |
952 | ||
953 | skb = skb_peek(&tid_data->deferred_tx_frames); | |
954 | if (!skb) | |
955 | return; | |
956 | hdr = (void *)skb->data; | |
957 | ||
958 | ac = iwl_mvm_tid_to_ac_queue(tid); | |
959 | mac_queue = IEEE80211_SKB_CB(skb)->hw_queue; | |
960 | ||
961 | if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE && | |
962 | iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) { | |
963 | IWL_ERR(mvm, | |
964 | "Can't alloc TXQ for sta %d tid %d - dropping frame\n", | |
965 | mvmsta->sta_id, tid); | |
966 | ||
967 | /* | |
968 | * Mark queue as problematic so later the deferred traffic is | |
969 | * freed, as we can do nothing with it | |
970 | */ | |
971 | no_queue = true; | |
972 | } | |
973 | ||
974 | __skb_queue_head_init(&deferred_tx); | |
975 | ||
976 | /* Disable bottom-halves when entering TX path */ | |
977 | local_bh_disable(); | |
978 | spin_lock(&mvmsta->lock); | |
979 | skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx); | |
980 | spin_unlock(&mvmsta->lock); | |
981 | ||
982 | while ((skb = __skb_dequeue(&deferred_tx))) | |
983 | if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta)) | |
984 | ieee80211_free_txskb(mvm->hw, skb); | |
985 | local_bh_enable(); | |
986 | ||
987 | /* Wake queue */ | |
988 | iwl_mvm_start_mac_queues(mvm, BIT(mac_queue)); | |
989 | } | |
990 | ||
991 | void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk) | |
992 | { | |
993 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, | |
994 | add_stream_wk); | |
995 | struct ieee80211_sta *sta; | |
996 | struct iwl_mvm_sta *mvmsta; | |
997 | unsigned long deferred_tid_traffic; | |
998 | int queue, sta_id, tid; | |
999 | ||
1000 | /* Check inactivity of queues */ | |
1001 | iwl_mvm_inactivity_check(mvm); | |
1002 | ||
1003 | mutex_lock(&mvm->mutex); | |
1004 | ||
1005 | /* Reconfigure queues requiring reconfiguation */ | |
1006 | for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) { | |
1007 | bool reconfig; | |
1008 | ||
1009 | spin_lock_bh(&mvm->queue_info_lock); | |
1010 | reconfig = (mvm->queue_info[queue].status == | |
1011 | IWL_MVM_QUEUE_RECONFIGURING); | |
1012 | spin_unlock_bh(&mvm->queue_info_lock); | |
1013 | ||
1014 | if (reconfig) | |
1015 | iwl_mvm_unshare_queue(mvm, queue); | |
1016 | } | |
1017 | ||
1018 | /* Go over all stations with deferred traffic */ | |
1019 | for_each_set_bit(sta_id, mvm->sta_deferred_frames, | |
1020 | IWL_MVM_STATION_COUNT) { | |
1021 | clear_bit(sta_id, mvm->sta_deferred_frames); | |
1022 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1023 | lockdep_is_held(&mvm->mutex)); | |
1024 | if (IS_ERR_OR_NULL(sta)) | |
1025 | continue; | |
1026 | ||
1027 | mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1028 | deferred_tid_traffic = mvmsta->deferred_traffic_tid_map; | |
1029 | ||
1030 | for_each_set_bit(tid, &deferred_tid_traffic, | |
1031 | IWL_MAX_TID_COUNT + 1) | |
1032 | iwl_mvm_tx_deferred_stream(mvm, sta, tid); | |
1033 | } | |
1034 | ||
1035 | mutex_unlock(&mvm->mutex); | |
1036 | } | |
1037 | ||
1038 | static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm, | |
1039 | struct ieee80211_sta *sta, | |
1040 | enum nl80211_iftype vif_type) | |
1041 | { | |
1042 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1043 | int queue; | |
1044 | ||
1045 | /* | |
1046 | * Check for inactive queues, so we don't reach a situation where we | |
1047 | * can't add a STA due to a shortage in queues that doesn't really exist | |
1048 | */ | |
1049 | iwl_mvm_inactivity_check(mvm); | |
1050 | ||
1051 | spin_lock_bh(&mvm->queue_info_lock); | |
1052 | ||
1053 | /* Make sure we have free resources for this STA */ | |
1054 | if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls && | |
1055 | !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount && | |
1056 | (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status == | |
1057 | IWL_MVM_QUEUE_FREE)) | |
1058 | queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE; | |
1059 | else | |
1060 | queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, | |
1061 | IWL_MVM_DQA_MIN_DATA_QUEUE, | |
1062 | IWL_MVM_DQA_MAX_DATA_QUEUE); | |
1063 | if (queue < 0) { | |
1064 | spin_unlock_bh(&mvm->queue_info_lock); | |
1065 | IWL_ERR(mvm, "No available queues for new station\n"); | |
1066 | return -ENOSPC; | |
1067 | } | |
1068 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED; | |
1069 | ||
1070 | spin_unlock_bh(&mvm->queue_info_lock); | |
1071 | ||
1072 | mvmsta->reserved_queue = queue; | |
1073 | ||
1074 | IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n", | |
1075 | queue, mvmsta->sta_id); | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * In DQA mode, after a HW restart the queues should be allocated as before, in | |
1082 | * order to avoid race conditions when there are shared queues. This function | |
1083 | * does the re-mapping and queue allocation. | |
1084 | * | |
1085 | * Note that re-enabling aggregations isn't done in this function. | |
1086 | */ | |
1087 | static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm, | |
1088 | struct iwl_mvm_sta *mvm_sta) | |
1089 | { | |
1090 | unsigned int wdg_timeout = | |
1091 | iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false); | |
1092 | int i; | |
1093 | struct iwl_trans_txq_scd_cfg cfg = { | |
1094 | .sta_id = mvm_sta->sta_id, | |
1095 | .frame_limit = IWL_FRAME_LIMIT, | |
1096 | }; | |
1097 | ||
1098 | /* Make sure reserved queue is still marked as such (or allocated) */ | |
1099 | mvm->queue_info[mvm_sta->reserved_queue].status = | |
1100 | IWL_MVM_QUEUE_RESERVED; | |
1101 | ||
1102 | for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { | |
1103 | struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i]; | |
1104 | int txq_id = tid_data->txq_id; | |
1105 | int ac; | |
1106 | u8 mac_queue; | |
1107 | ||
1108 | if (txq_id == IEEE80211_INVAL_HW_QUEUE) | |
1109 | continue; | |
1110 | ||
1111 | skb_queue_head_init(&tid_data->deferred_tx_frames); | |
1112 | ||
1113 | ac = tid_to_mac80211_ac[i]; | |
1114 | mac_queue = mvm_sta->vif->hw_queue[ac]; | |
1115 | ||
1116 | cfg.tid = i; | |
1117 | cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac]; | |
1118 | cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE || | |
1119 | txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE); | |
1120 | ||
1121 | IWL_DEBUG_TX_QUEUES(mvm, | |
1122 | "Re-mapping sta %d tid %d to queue %d\n", | |
1123 | mvm_sta->sta_id, i, txq_id); | |
1124 | ||
1125 | iwl_mvm_enable_txq(mvm, txq_id, mac_queue, | |
1126 | IEEE80211_SEQ_TO_SN(tid_data->seq_number), | |
1127 | &cfg, wdg_timeout); | |
1128 | ||
1129 | mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; | |
1130 | } | |
1131 | ||
1132 | atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0); | |
1133 | } | |
1134 | ||
1135 | int iwl_mvm_add_sta(struct iwl_mvm *mvm, | |
1136 | struct ieee80211_vif *vif, | |
1137 | struct ieee80211_sta *sta) | |
1138 | { | |
1139 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1140 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1141 | struct iwl_mvm_rxq_dup_data *dup_data; | |
1142 | int i, ret, sta_id; | |
1143 | ||
1144 | lockdep_assert_held(&mvm->mutex); | |
1145 | ||
1146 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) | |
1147 | sta_id = iwl_mvm_find_free_sta_id(mvm, | |
1148 | ieee80211_vif_type_p2p(vif)); | |
1149 | else | |
1150 | sta_id = mvm_sta->sta_id; | |
1151 | ||
1152 | if (sta_id == IWL_MVM_STATION_COUNT) | |
1153 | return -ENOSPC; | |
1154 | ||
1155 | spin_lock_init(&mvm_sta->lock); | |
1156 | ||
1157 | /* In DQA mode, if this is a HW restart, re-alloc existing queues */ | |
1158 | if (iwl_mvm_is_dqa_supported(mvm) && | |
1159 | test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
1160 | iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta); | |
1161 | goto update_fw; | |
1162 | } | |
1163 | ||
1164 | mvm_sta->sta_id = sta_id; | |
1165 | mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, | |
1166 | mvmvif->color); | |
1167 | mvm_sta->vif = vif; | |
1168 | mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
1169 | mvm_sta->tx_protection = 0; | |
1170 | mvm_sta->tt_tx_protection = false; | |
1171 | ||
1172 | /* HW restart, don't assume the memory has been zeroed */ | |
1173 | atomic_set(&mvm->pending_frames[sta_id], 0); | |
1174 | mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */ | |
1175 | mvm_sta->tfd_queue_msk = 0; | |
1176 | ||
1177 | /* | |
1178 | * Allocate new queues for a TDLS station, unless we're in DQA mode, | |
1179 | * and then they'll be allocated dynamically | |
1180 | */ | |
1181 | if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) { | |
1182 | ret = iwl_mvm_tdls_sta_init(mvm, sta); | |
1183 | if (ret) | |
1184 | return ret; | |
1185 | } else if (!iwl_mvm_is_dqa_supported(mvm)) { | |
1186 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
1187 | if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) | |
1188 | mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); | |
1189 | } | |
1190 | ||
1191 | /* for HW restart - reset everything but the sequence number */ | |
1192 | for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { | |
1193 | u16 seq = mvm_sta->tid_data[i].seq_number; | |
1194 | memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); | |
1195 | mvm_sta->tid_data[i].seq_number = seq; | |
1196 | ||
1197 | if (!iwl_mvm_is_dqa_supported(mvm)) | |
1198 | continue; | |
1199 | ||
1200 | /* | |
1201 | * Mark all queues for this STA as unallocated and defer TX | |
1202 | * frames until the queue is allocated | |
1203 | */ | |
1204 | mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; | |
1205 | skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames); | |
1206 | } | |
1207 | mvm_sta->deferred_traffic_tid_map = 0; | |
1208 | mvm_sta->agg_tids = 0; | |
1209 | ||
1210 | if (iwl_mvm_has_new_rx_api(mvm) && | |
1211 | !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
1212 | dup_data = kcalloc(mvm->trans->num_rx_queues, | |
1213 | sizeof(*dup_data), | |
1214 | GFP_KERNEL); | |
1215 | if (!dup_data) | |
1216 | return -ENOMEM; | |
1217 | mvm_sta->dup_data = dup_data; | |
1218 | } | |
1219 | ||
1220 | if (iwl_mvm_is_dqa_supported(mvm)) { | |
1221 | ret = iwl_mvm_reserve_sta_stream(mvm, sta, | |
1222 | ieee80211_vif_type_p2p(vif)); | |
1223 | if (ret) | |
1224 | goto err; | |
1225 | } | |
1226 | ||
1227 | update_fw: | |
1228 | ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0); | |
1229 | if (ret) | |
1230 | goto err; | |
1231 | ||
1232 | if (vif->type == NL80211_IFTYPE_STATION) { | |
1233 | if (!sta->tdls) { | |
1234 | WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); | |
1235 | mvmvif->ap_sta_id = sta_id; | |
1236 | } else { | |
1237 | WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); | |
1242 | ||
1243 | return 0; | |
1244 | ||
1245 | err: | |
1246 | if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) | |
1247 | iwl_mvm_tdls_sta_deinit(mvm, sta); | |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | int iwl_mvm_update_sta(struct iwl_mvm *mvm, | |
1252 | struct ieee80211_vif *vif, | |
1253 | struct ieee80211_sta *sta) | |
1254 | { | |
1255 | return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0); | |
1256 | } | |
1257 | ||
1258 | int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, | |
1259 | bool drain) | |
1260 | { | |
1261 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
1262 | int ret; | |
1263 | u32 status; | |
1264 | ||
1265 | lockdep_assert_held(&mvm->mutex); | |
1266 | ||
1267 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
1268 | cmd.sta_id = mvmsta->sta_id; | |
1269 | cmd.add_modify = STA_MODE_MODIFY; | |
1270 | cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; | |
1271 | cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); | |
1272 | ||
1273 | status = ADD_STA_SUCCESS; | |
1274 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, | |
1275 | iwl_mvm_add_sta_cmd_size(mvm), | |
1276 | &cmd, &status); | |
1277 | if (ret) | |
1278 | return ret; | |
1279 | ||
1280 | switch (status & IWL_ADD_STA_STATUS_MASK) { | |
1281 | case ADD_STA_SUCCESS: | |
1282 | IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", | |
1283 | mvmsta->sta_id); | |
1284 | break; | |
1285 | default: | |
1286 | ret = -EIO; | |
1287 | IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", | |
1288 | mvmsta->sta_id); | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | /* | |
1296 | * Remove a station from the FW table. Before sending the command to remove | |
1297 | * the station validate that the station is indeed known to the driver (sanity | |
1298 | * only). | |
1299 | */ | |
1300 | static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) | |
1301 | { | |
1302 | struct ieee80211_sta *sta; | |
1303 | struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { | |
1304 | .sta_id = sta_id, | |
1305 | }; | |
1306 | int ret; | |
1307 | ||
1308 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1309 | lockdep_is_held(&mvm->mutex)); | |
1310 | ||
1311 | /* Note: internal stations are marked as error values */ | |
1312 | if (!sta) { | |
1313 | IWL_ERR(mvm, "Invalid station id\n"); | |
1314 | return -EINVAL; | |
1315 | } | |
1316 | ||
1317 | ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, | |
1318 | sizeof(rm_sta_cmd), &rm_sta_cmd); | |
1319 | if (ret) { | |
1320 | IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | void iwl_mvm_sta_drained_wk(struct work_struct *wk) | |
1328 | { | |
1329 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); | |
1330 | u8 sta_id; | |
1331 | ||
1332 | /* | |
1333 | * The mutex is needed because of the SYNC cmd, but not only: if the | |
1334 | * work would run concurrently with iwl_mvm_rm_sta, it would run before | |
1335 | * iwl_mvm_rm_sta sets the station as busy, and exit. Then | |
1336 | * iwl_mvm_rm_sta would set the station as busy, and nobody will clean | |
1337 | * that later. | |
1338 | */ | |
1339 | mutex_lock(&mvm->mutex); | |
1340 | ||
1341 | for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { | |
1342 | int ret; | |
1343 | struct ieee80211_sta *sta = | |
1344 | rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1345 | lockdep_is_held(&mvm->mutex)); | |
1346 | ||
1347 | /* | |
1348 | * This station is in use or RCU-removed; the latter happens in | |
1349 | * managed mode, where mac80211 removes the station before we | |
1350 | * can remove it from firmware (we can only do that after the | |
1351 | * MAC is marked unassociated), and possibly while the deauth | |
1352 | * frame to disconnect from the AP is still queued. Then, the | |
1353 | * station pointer is -ENOENT when the last skb is reclaimed. | |
1354 | */ | |
1355 | if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) | |
1356 | continue; | |
1357 | ||
1358 | if (PTR_ERR(sta) == -EINVAL) { | |
1359 | IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", | |
1360 | sta_id); | |
1361 | continue; | |
1362 | } | |
1363 | ||
1364 | if (!sta) { | |
1365 | IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", | |
1366 | sta_id); | |
1367 | continue; | |
1368 | } | |
1369 | ||
1370 | WARN_ON(PTR_ERR(sta) != -EBUSY); | |
1371 | /* This station was removed and we waited until it got drained, | |
1372 | * we can now proceed and remove it. | |
1373 | */ | |
1374 | ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
1375 | if (ret) { | |
1376 | IWL_ERR(mvm, | |
1377 | "Couldn't remove sta %d after it was drained\n", | |
1378 | sta_id); | |
1379 | continue; | |
1380 | } | |
1381 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); | |
1382 | clear_bit(sta_id, mvm->sta_drained); | |
1383 | ||
1384 | if (mvm->tfd_drained[sta_id]) { | |
1385 | unsigned long i, msk = mvm->tfd_drained[sta_id]; | |
1386 | ||
1387 | for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) | |
1388 | iwl_mvm_disable_txq(mvm, i, i, | |
1389 | IWL_MAX_TID_COUNT, 0); | |
1390 | ||
1391 | mvm->tfd_drained[sta_id] = 0; | |
1392 | IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", | |
1393 | sta_id, msk); | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | mutex_unlock(&mvm->mutex); | |
1398 | } | |
1399 | ||
1400 | static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm, | |
1401 | struct ieee80211_vif *vif, | |
1402 | struct iwl_mvm_sta *mvm_sta) | |
1403 | { | |
1404 | int ac; | |
1405 | int i; | |
1406 | ||
1407 | lockdep_assert_held(&mvm->mutex); | |
1408 | ||
1409 | for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) { | |
1410 | if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE) | |
1411 | continue; | |
1412 | ||
1413 | ac = iwl_mvm_tid_to_ac_queue(i); | |
1414 | iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id, | |
1415 | vif->hw_queue[ac], i, 0); | |
1416 | mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE; | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | int iwl_mvm_rm_sta(struct iwl_mvm *mvm, | |
1421 | struct ieee80211_vif *vif, | |
1422 | struct ieee80211_sta *sta) | |
1423 | { | |
1424 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1425 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1426 | int ret; | |
1427 | ||
1428 | lockdep_assert_held(&mvm->mutex); | |
1429 | ||
1430 | if (iwl_mvm_has_new_rx_api(mvm)) | |
1431 | kfree(mvm_sta->dup_data); | |
1432 | ||
1433 | if ((vif->type == NL80211_IFTYPE_STATION && | |
1434 | mvmvif->ap_sta_id == mvm_sta->sta_id) || | |
1435 | iwl_mvm_is_dqa_supported(mvm)){ | |
1436 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
1437 | if (ret) | |
1438 | return ret; | |
1439 | /* flush its queues here since we are freeing mvm_sta */ | |
1440 | ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0); | |
1441 | if (ret) | |
1442 | return ret; | |
1443 | ret = iwl_trans_wait_tx_queue_empty(mvm->trans, | |
1444 | mvm_sta->tfd_queue_msk); | |
1445 | if (ret) | |
1446 | return ret; | |
1447 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); | |
1448 | ||
1449 | /* If DQA is supported - the queues can be disabled now */ | |
1450 | if (iwl_mvm_is_dqa_supported(mvm)) | |
1451 | iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); | |
1452 | ||
1453 | if (vif->type == NL80211_IFTYPE_STATION && | |
1454 | mvmvif->ap_sta_id == mvm_sta->sta_id) { | |
1455 | /* if associated - we can't remove the AP STA now */ | |
1456 | if (vif->bss_conf.assoc) | |
1457 | return ret; | |
1458 | ||
1459 | /* unassoc - go ahead - remove the AP STA now */ | |
1460 | mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; | |
1461 | ||
1462 | /* clear d0i3_ap_sta_id if no longer relevant */ | |
1463 | if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) | |
1464 | mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * This shouldn't happen - the TDLS channel switch should be canceled | |
1470 | * before the STA is removed. | |
1471 | */ | |
1472 | if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { | |
1473 | mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; | |
1474 | cancel_delayed_work(&mvm->tdls_cs.dwork); | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Make sure that the tx response code sees the station as -EBUSY and | |
1479 | * calls the drain worker. | |
1480 | */ | |
1481 | spin_lock_bh(&mvm_sta->lock); | |
1482 | /* | |
1483 | * There are frames pending on the AC queues for this station. | |
1484 | * We need to wait until all the frames are drained... | |
1485 | */ | |
1486 | if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { | |
1487 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], | |
1488 | ERR_PTR(-EBUSY)); | |
1489 | spin_unlock_bh(&mvm_sta->lock); | |
1490 | ||
1491 | /* disable TDLS sta queues on drain complete */ | |
1492 | if (sta->tdls) { | |
1493 | mvm->tfd_drained[mvm_sta->sta_id] = | |
1494 | mvm_sta->tfd_queue_msk; | |
1495 | IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", | |
1496 | mvm_sta->sta_id); | |
1497 | } | |
1498 | ||
1499 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
1500 | } else { | |
1501 | spin_unlock_bh(&mvm_sta->lock); | |
1502 | ||
1503 | if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) | |
1504 | iwl_mvm_tdls_sta_deinit(mvm, sta); | |
1505 | ||
1506 | ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); | |
1507 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); | |
1508 | } | |
1509 | ||
1510 | return ret; | |
1511 | } | |
1512 | ||
1513 | int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, | |
1514 | struct ieee80211_vif *vif, | |
1515 | u8 sta_id) | |
1516 | { | |
1517 | int ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
1518 | ||
1519 | lockdep_assert_held(&mvm->mutex); | |
1520 | ||
1521 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); | |
1522 | return ret; | |
1523 | } | |
1524 | ||
1525 | int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, | |
1526 | struct iwl_mvm_int_sta *sta, | |
1527 | u32 qmask, enum nl80211_iftype iftype) | |
1528 | { | |
1529 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
1530 | sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); | |
1531 | if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) | |
1532 | return -ENOSPC; | |
1533 | } | |
1534 | ||
1535 | sta->tfd_queue_msk = qmask; | |
1536 | ||
1537 | /* put a non-NULL value so iterating over the stations won't stop */ | |
1538 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); | |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, | |
1543 | struct iwl_mvm_int_sta *sta) | |
1544 | { | |
1545 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); | |
1546 | memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); | |
1547 | sta->sta_id = IWL_MVM_STATION_COUNT; | |
1548 | } | |
1549 | ||
1550 | static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, | |
1551 | struct iwl_mvm_int_sta *sta, | |
1552 | const u8 *addr, | |
1553 | u16 mac_id, u16 color) | |
1554 | { | |
1555 | struct iwl_mvm_add_sta_cmd cmd; | |
1556 | int ret; | |
1557 | u32 status; | |
1558 | ||
1559 | lockdep_assert_held(&mvm->mutex); | |
1560 | ||
1561 | memset(&cmd, 0, sizeof(cmd)); | |
1562 | cmd.sta_id = sta->sta_id; | |
1563 | cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, | |
1564 | color)); | |
1565 | ||
1566 | cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); | |
1567 | cmd.tid_disable_tx = cpu_to_le16(0xffff); | |
1568 | ||
1569 | if (addr) | |
1570 | memcpy(cmd.addr, addr, ETH_ALEN); | |
1571 | ||
1572 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, | |
1573 | iwl_mvm_add_sta_cmd_size(mvm), | |
1574 | &cmd, &status); | |
1575 | if (ret) | |
1576 | return ret; | |
1577 | ||
1578 | switch (status & IWL_ADD_STA_STATUS_MASK) { | |
1579 | case ADD_STA_SUCCESS: | |
1580 | IWL_DEBUG_INFO(mvm, "Internal station added.\n"); | |
1581 | return 0; | |
1582 | default: | |
1583 | ret = -EIO; | |
1584 | IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", | |
1585 | status); | |
1586 | break; | |
1587 | } | |
1588 | return ret; | |
1589 | } | |
1590 | ||
1591 | int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) | |
1592 | { | |
1593 | unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? | |
1594 | mvm->cfg->base_params->wd_timeout : | |
1595 | IWL_WATCHDOG_DISABLED; | |
1596 | int ret; | |
1597 | ||
1598 | lockdep_assert_held(&mvm->mutex); | |
1599 | ||
1600 | /* Map Aux queue to fifo - needs to happen before adding Aux station */ | |
1601 | if (!iwl_mvm_is_dqa_supported(mvm)) | |
1602 | iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue, | |
1603 | IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); | |
1604 | ||
1605 | /* Allocate aux station and assign to it the aux queue */ | |
1606 | ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), | |
1607 | NL80211_IFTYPE_UNSPECIFIED); | |
1608 | if (ret) | |
1609 | return ret; | |
1610 | ||
1611 | if (iwl_mvm_is_dqa_supported(mvm)) { | |
1612 | struct iwl_trans_txq_scd_cfg cfg = { | |
1613 | .fifo = IWL_MVM_TX_FIFO_MCAST, | |
1614 | .sta_id = mvm->aux_sta.sta_id, | |
1615 | .tid = IWL_MAX_TID_COUNT, | |
1616 | .aggregate = false, | |
1617 | .frame_limit = IWL_FRAME_LIMIT, | |
1618 | }; | |
1619 | ||
1620 | iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg, | |
1621 | wdg_timeout); | |
1622 | } | |
1623 | ||
1624 | ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, | |
1625 | MAC_INDEX_AUX, 0); | |
1626 | ||
1627 | if (ret) | |
1628 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
1629 | return ret; | |
1630 | } | |
1631 | ||
1632 | int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1633 | { | |
1634 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1635 | ||
1636 | lockdep_assert_held(&mvm->mutex); | |
1637 | return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr, | |
1638 | mvmvif->id, 0); | |
1639 | } | |
1640 | ||
1641 | int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1642 | { | |
1643 | int ret; | |
1644 | ||
1645 | lockdep_assert_held(&mvm->mutex); | |
1646 | ||
1647 | ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id); | |
1648 | if (ret) | |
1649 | IWL_WARN(mvm, "Failed sending remove station\n"); | |
1650 | ||
1651 | return ret; | |
1652 | } | |
1653 | ||
1654 | void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm) | |
1655 | { | |
1656 | iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta); | |
1657 | } | |
1658 | ||
1659 | void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) | |
1660 | { | |
1661 | lockdep_assert_held(&mvm->mutex); | |
1662 | ||
1663 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
1664 | } | |
1665 | ||
1666 | /* | |
1667 | * Send the add station command for the vif's broadcast station. | |
1668 | * Assumes that the station was already allocated. | |
1669 | * | |
1670 | * @mvm: the mvm component | |
1671 | * @vif: the interface to which the broadcast station is added | |
1672 | * @bsta: the broadcast station to add. | |
1673 | */ | |
1674 | int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1675 | { | |
1676 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1677 | struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; | |
1678 | static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
1679 | const u8 *baddr = _baddr; | |
1680 | ||
1681 | lockdep_assert_held(&mvm->mutex); | |
1682 | ||
1683 | if (iwl_mvm_is_dqa_supported(mvm)) { | |
1684 | struct iwl_trans_txq_scd_cfg cfg = { | |
1685 | .fifo = IWL_MVM_TX_FIFO_VO, | |
1686 | .sta_id = mvmvif->bcast_sta.sta_id, | |
1687 | .tid = IWL_MAX_TID_COUNT, | |
1688 | .aggregate = false, | |
1689 | .frame_limit = IWL_FRAME_LIMIT, | |
1690 | }; | |
1691 | unsigned int wdg_timeout = | |
1692 | iwl_mvm_get_wd_timeout(mvm, vif, false, false); | |
1693 | int queue; | |
1694 | ||
1695 | if ((vif->type == NL80211_IFTYPE_AP) && | |
1696 | (mvmvif->bcast_sta.tfd_queue_msk & | |
1697 | BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE))) | |
1698 | queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; | |
1699 | else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) && | |
1700 | (mvmvif->bcast_sta.tfd_queue_msk & | |
1701 | BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE))) | |
1702 | queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE; | |
1703 | else if (WARN(1, "Missed required TXQ for adding bcast STA\n")) | |
1704 | return -EINVAL; | |
1705 | ||
1706 | iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg, | |
1707 | wdg_timeout); | |
1708 | } | |
1709 | ||
1710 | if (vif->type == NL80211_IFTYPE_ADHOC) | |
1711 | baddr = vif->bss_conf.bssid; | |
1712 | ||
1713 | if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) | |
1714 | return -ENOSPC; | |
1715 | ||
1716 | return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
1717 | mvmvif->id, mvmvif->color); | |
1718 | } | |
1719 | ||
1720 | /* Send the FW a request to remove the station from it's internal data | |
1721 | * structures, but DO NOT remove the entry from the local data structures. */ | |
1722 | int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1723 | { | |
1724 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1725 | int ret; | |
1726 | ||
1727 | lockdep_assert_held(&mvm->mutex); | |
1728 | ||
1729 | ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); | |
1730 | if (ret) | |
1731 | IWL_WARN(mvm, "Failed sending remove station\n"); | |
1732 | return ret; | |
1733 | } | |
1734 | ||
1735 | int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1736 | { | |
1737 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1738 | u32 qmask = 0; | |
1739 | ||
1740 | lockdep_assert_held(&mvm->mutex); | |
1741 | ||
1742 | if (!iwl_mvm_is_dqa_supported(mvm)) | |
1743 | qmask = iwl_mvm_mac_get_queues_mask(vif); | |
1744 | ||
1745 | if (vif->type == NL80211_IFTYPE_AP) { | |
1746 | /* | |
1747 | * The firmware defines the TFD queue mask to only be relevant | |
1748 | * for *unicast* queues, so the multicast (CAB) queue shouldn't | |
1749 | * be included. | |
1750 | */ | |
1751 | qmask &= ~BIT(vif->cab_queue); | |
1752 | ||
1753 | if (iwl_mvm_is_dqa_supported(mvm)) | |
1754 | qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE); | |
1755 | } else if (iwl_mvm_is_dqa_supported(mvm) && | |
1756 | vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
1757 | qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE); | |
1758 | } | |
1759 | ||
1760 | return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, | |
1761 | ieee80211_vif_type_p2p(vif)); | |
1762 | } | |
1763 | ||
1764 | /* Allocate a new station entry for the broadcast station to the given vif, | |
1765 | * and send it to the FW. | |
1766 | * Note that each P2P mac should have its own broadcast station. | |
1767 | * | |
1768 | * @mvm: the mvm component | |
1769 | * @vif: the interface to which the broadcast station is added | |
1770 | * @bsta: the broadcast station to add. */ | |
1771 | int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1772 | { | |
1773 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1774 | struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; | |
1775 | int ret; | |
1776 | ||
1777 | lockdep_assert_held(&mvm->mutex); | |
1778 | ||
1779 | ret = iwl_mvm_alloc_bcast_sta(mvm, vif); | |
1780 | if (ret) | |
1781 | return ret; | |
1782 | ||
1783 | ret = iwl_mvm_send_add_bcast_sta(mvm, vif); | |
1784 | ||
1785 | if (ret) | |
1786 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
1787 | ||
1788 | return ret; | |
1789 | } | |
1790 | ||
1791 | void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1792 | { | |
1793 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1794 | ||
1795 | iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); | |
1796 | } | |
1797 | ||
1798 | /* | |
1799 | * Send the FW a request to remove the station from it's internal data | |
1800 | * structures, and in addition remove it from the local data structure. | |
1801 | */ | |
1802 | int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1803 | { | |
1804 | int ret; | |
1805 | ||
1806 | lockdep_assert_held(&mvm->mutex); | |
1807 | ||
1808 | ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); | |
1809 | ||
1810 | iwl_mvm_dealloc_bcast_sta(mvm, vif); | |
1811 | ||
1812 | return ret; | |
1813 | } | |
1814 | ||
1815 | #define IWL_MAX_RX_BA_SESSIONS 16 | |
1816 | ||
1817 | static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid) | |
1818 | { | |
1819 | struct iwl_mvm_delba_notif notif = { | |
1820 | .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA, | |
1821 | .metadata.sync = 1, | |
1822 | .delba.baid = baid, | |
1823 | }; | |
1824 | iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif)); | |
1825 | }; | |
1826 | ||
1827 | static void iwl_mvm_free_reorder(struct iwl_mvm *mvm, | |
1828 | struct iwl_mvm_baid_data *data) | |
1829 | { | |
1830 | int i; | |
1831 | ||
1832 | iwl_mvm_sync_rxq_del_ba(mvm, data->baid); | |
1833 | ||
1834 | for (i = 0; i < mvm->trans->num_rx_queues; i++) { | |
1835 | int j; | |
1836 | struct iwl_mvm_reorder_buffer *reorder_buf = | |
1837 | &data->reorder_buf[i]; | |
1838 | ||
1839 | spin_lock_bh(&reorder_buf->lock); | |
1840 | if (likely(!reorder_buf->num_stored)) { | |
1841 | spin_unlock_bh(&reorder_buf->lock); | |
1842 | continue; | |
1843 | } | |
1844 | ||
1845 | /* | |
1846 | * This shouldn't happen in regular DELBA since the internal | |
1847 | * delBA notification should trigger a release of all frames in | |
1848 | * the reorder buffer. | |
1849 | */ | |
1850 | WARN_ON(1); | |
1851 | ||
1852 | for (j = 0; j < reorder_buf->buf_size; j++) | |
1853 | __skb_queue_purge(&reorder_buf->entries[j]); | |
1854 | /* | |
1855 | * Prevent timer re-arm. This prevents a very far fetched case | |
1856 | * where we timed out on the notification. There may be prior | |
1857 | * RX frames pending in the RX queue before the notification | |
1858 | * that might get processed between now and the actual deletion | |
1859 | * and we would re-arm the timer although we are deleting the | |
1860 | * reorder buffer. | |
1861 | */ | |
1862 | reorder_buf->removed = true; | |
1863 | spin_unlock_bh(&reorder_buf->lock); | |
1864 | del_timer_sync(&reorder_buf->reorder_timer); | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm, | |
1869 | u32 sta_id, | |
1870 | struct iwl_mvm_baid_data *data, | |
1871 | u16 ssn, u8 buf_size) | |
1872 | { | |
1873 | int i; | |
1874 | ||
1875 | for (i = 0; i < mvm->trans->num_rx_queues; i++) { | |
1876 | struct iwl_mvm_reorder_buffer *reorder_buf = | |
1877 | &data->reorder_buf[i]; | |
1878 | int j; | |
1879 | ||
1880 | reorder_buf->num_stored = 0; | |
1881 | reorder_buf->head_sn = ssn; | |
1882 | reorder_buf->buf_size = buf_size; | |
1883 | /* rx reorder timer */ | |
1884 | reorder_buf->reorder_timer.function = | |
1885 | iwl_mvm_reorder_timer_expired; | |
1886 | reorder_buf->reorder_timer.data = (unsigned long)reorder_buf; | |
1887 | init_timer(&reorder_buf->reorder_timer); | |
1888 | spin_lock_init(&reorder_buf->lock); | |
1889 | reorder_buf->mvm = mvm; | |
1890 | reorder_buf->queue = i; | |
1891 | reorder_buf->sta_id = sta_id; | |
1892 | for (j = 0; j < reorder_buf->buf_size; j++) | |
1893 | __skb_queue_head_init(&reorder_buf->entries[j]); | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
1898 | int tid, u16 ssn, bool start, u8 buf_size, u16 timeout) | |
1899 | { | |
1900 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1901 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
1902 | struct iwl_mvm_baid_data *baid_data = NULL; | |
1903 | int ret; | |
1904 | u32 status; | |
1905 | ||
1906 | lockdep_assert_held(&mvm->mutex); | |
1907 | ||
1908 | if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { | |
1909 | IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); | |
1910 | return -ENOSPC; | |
1911 | } | |
1912 | ||
1913 | if (iwl_mvm_has_new_rx_api(mvm) && start) { | |
1914 | /* | |
1915 | * Allocate here so if allocation fails we can bail out early | |
1916 | * before starting the BA session in the firmware | |
1917 | */ | |
1918 | baid_data = kzalloc(sizeof(*baid_data) + | |
1919 | mvm->trans->num_rx_queues * | |
1920 | sizeof(baid_data->reorder_buf[0]), | |
1921 | GFP_KERNEL); | |
1922 | if (!baid_data) | |
1923 | return -ENOMEM; | |
1924 | } | |
1925 | ||
1926 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
1927 | cmd.sta_id = mvm_sta->sta_id; | |
1928 | cmd.add_modify = STA_MODE_MODIFY; | |
1929 | if (start) { | |
1930 | cmd.add_immediate_ba_tid = (u8) tid; | |
1931 | cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
1932 | cmd.rx_ba_window = cpu_to_le16((u16)buf_size); | |
1933 | } else { | |
1934 | cmd.remove_immediate_ba_tid = (u8) tid; | |
1935 | } | |
1936 | cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : | |
1937 | STA_MODIFY_REMOVE_BA_TID; | |
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 | goto out_free; | |
1945 | ||
1946 | switch (status & IWL_ADD_STA_STATUS_MASK) { | |
1947 | case ADD_STA_SUCCESS: | |
1948 | IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n", | |
1949 | start ? "start" : "stopp"); | |
1950 | break; | |
1951 | case ADD_STA_IMMEDIATE_BA_FAILURE: | |
1952 | IWL_WARN(mvm, "RX BA Session refused by fw\n"); | |
1953 | ret = -ENOSPC; | |
1954 | break; | |
1955 | default: | |
1956 | ret = -EIO; | |
1957 | IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", | |
1958 | start ? "start" : "stopp", status); | |
1959 | break; | |
1960 | } | |
1961 | ||
1962 | if (ret) | |
1963 | goto out_free; | |
1964 | ||
1965 | if (start) { | |
1966 | u8 baid; | |
1967 | ||
1968 | mvm->rx_ba_sessions++; | |
1969 | ||
1970 | if (!iwl_mvm_has_new_rx_api(mvm)) | |
1971 | return 0; | |
1972 | ||
1973 | if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) { | |
1974 | ret = -EINVAL; | |
1975 | goto out_free; | |
1976 | } | |
1977 | baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >> | |
1978 | IWL_ADD_STA_BAID_SHIFT); | |
1979 | baid_data->baid = baid; | |
1980 | baid_data->timeout = timeout; | |
1981 | baid_data->last_rx = jiffies; | |
1982 | init_timer(&baid_data->session_timer); | |
1983 | baid_data->session_timer.function = | |
1984 | iwl_mvm_rx_agg_session_expired; | |
1985 | baid_data->session_timer.data = | |
1986 | (unsigned long)&mvm->baid_map[baid]; | |
1987 | baid_data->mvm = mvm; | |
1988 | baid_data->tid = tid; | |
1989 | baid_data->sta_id = mvm_sta->sta_id; | |
1990 | ||
1991 | mvm_sta->tid_to_baid[tid] = baid; | |
1992 | if (timeout) | |
1993 | mod_timer(&baid_data->session_timer, | |
1994 | TU_TO_EXP_TIME(timeout * 2)); | |
1995 | ||
1996 | iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id, | |
1997 | baid_data, ssn, buf_size); | |
1998 | /* | |
1999 | * protect the BA data with RCU to cover a case where our | |
2000 | * internal RX sync mechanism will timeout (not that it's | |
2001 | * supposed to happen) and we will free the session data while | |
2002 | * RX is being processed in parallel | |
2003 | */ | |
2004 | IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n", | |
2005 | mvm_sta->sta_id, tid, baid); | |
2006 | WARN_ON(rcu_access_pointer(mvm->baid_map[baid])); | |
2007 | rcu_assign_pointer(mvm->baid_map[baid], baid_data); | |
2008 | } else { | |
2009 | u8 baid = mvm_sta->tid_to_baid[tid]; | |
2010 | ||
2011 | if (mvm->rx_ba_sessions > 0) | |
2012 | /* check that restart flow didn't zero the counter */ | |
2013 | mvm->rx_ba_sessions--; | |
2014 | if (!iwl_mvm_has_new_rx_api(mvm)) | |
2015 | return 0; | |
2016 | ||
2017 | if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID)) | |
2018 | return -EINVAL; | |
2019 | ||
2020 | baid_data = rcu_access_pointer(mvm->baid_map[baid]); | |
2021 | if (WARN_ON(!baid_data)) | |
2022 | return -EINVAL; | |
2023 | ||
2024 | /* synchronize all rx queues so we can safely delete */ | |
2025 | iwl_mvm_free_reorder(mvm, baid_data); | |
2026 | del_timer_sync(&baid_data->session_timer); | |
2027 | RCU_INIT_POINTER(mvm->baid_map[baid], NULL); | |
2028 | kfree_rcu(baid_data, rcu_head); | |
2029 | IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid); | |
2030 | } | |
2031 | return 0; | |
2032 | ||
2033 | out_free: | |
2034 | kfree(baid_data); | |
2035 | return ret; | |
2036 | } | |
2037 | ||
2038 | int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
2039 | int tid, u8 queue, bool start) | |
2040 | { | |
2041 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
2042 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
2043 | int ret; | |
2044 | u32 status; | |
2045 | ||
2046 | lockdep_assert_held(&mvm->mutex); | |
2047 | ||
2048 | if (start) { | |
2049 | mvm_sta->tfd_queue_msk |= BIT(queue); | |
2050 | mvm_sta->tid_disable_agg &= ~BIT(tid); | |
2051 | } else { | |
2052 | /* In DQA-mode the queue isn't removed on agg termination */ | |
2053 | if (!iwl_mvm_is_dqa_supported(mvm)) | |
2054 | mvm_sta->tfd_queue_msk &= ~BIT(queue); | |
2055 | mvm_sta->tid_disable_agg |= BIT(tid); | |
2056 | } | |
2057 | ||
2058 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
2059 | cmd.sta_id = mvm_sta->sta_id; | |
2060 | cmd.add_modify = STA_MODE_MODIFY; | |
2061 | cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; | |
2062 | cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
2063 | cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); | |
2064 | ||
2065 | status = ADD_STA_SUCCESS; | |
2066 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, | |
2067 | iwl_mvm_add_sta_cmd_size(mvm), | |
2068 | &cmd, &status); | |
2069 | if (ret) | |
2070 | return ret; | |
2071 | ||
2072 | switch (status & IWL_ADD_STA_STATUS_MASK) { | |
2073 | case ADD_STA_SUCCESS: | |
2074 | break; | |
2075 | default: | |
2076 | ret = -EIO; | |
2077 | IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", | |
2078 | start ? "start" : "stopp", status); | |
2079 | break; | |
2080 | } | |
2081 | ||
2082 | return ret; | |
2083 | } | |
2084 | ||
2085 | const u8 tid_to_mac80211_ac[] = { | |
2086 | IEEE80211_AC_BE, | |
2087 | IEEE80211_AC_BK, | |
2088 | IEEE80211_AC_BK, | |
2089 | IEEE80211_AC_BE, | |
2090 | IEEE80211_AC_VI, | |
2091 | IEEE80211_AC_VI, | |
2092 | IEEE80211_AC_VO, | |
2093 | IEEE80211_AC_VO, | |
2094 | IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */ | |
2095 | }; | |
2096 | ||
2097 | static const u8 tid_to_ucode_ac[] = { | |
2098 | AC_BE, | |
2099 | AC_BK, | |
2100 | AC_BK, | |
2101 | AC_BE, | |
2102 | AC_VI, | |
2103 | AC_VI, | |
2104 | AC_VO, | |
2105 | AC_VO, | |
2106 | }; | |
2107 | ||
2108 | int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
2109 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
2110 | { | |
2111 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2112 | struct iwl_mvm_tid_data *tid_data; | |
2113 | int txq_id; | |
2114 | int ret; | |
2115 | ||
2116 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
2117 | return -EINVAL; | |
2118 | ||
2119 | if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { | |
2120 | IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", | |
2121 | mvmsta->tid_data[tid].state); | |
2122 | return -ENXIO; | |
2123 | } | |
2124 | ||
2125 | lockdep_assert_held(&mvm->mutex); | |
2126 | ||
2127 | spin_lock_bh(&mvmsta->lock); | |
2128 | ||
2129 | /* possible race condition - we entered D0i3 while starting agg */ | |
2130 | if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { | |
2131 | spin_unlock_bh(&mvmsta->lock); | |
2132 | IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); | |
2133 | return -EIO; | |
2134 | } | |
2135 | ||
2136 | spin_lock(&mvm->queue_info_lock); | |
2137 | ||
2138 | /* | |
2139 | * Note the possible cases: | |
2140 | * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed | |
2141 | * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free | |
2142 | * one and mark it as reserved | |
2143 | * 3. In DQA mode, but no traffic yet on this TID: same treatment as in | |
2144 | * non-DQA mode, since the TXQ hasn't yet been allocated | |
2145 | */ | |
2146 | txq_id = mvmsta->tid_data[tid].txq_id; | |
2147 | if (iwl_mvm_is_dqa_supported(mvm) && | |
2148 | unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) { | |
2149 | ret = -ENXIO; | |
2150 | IWL_DEBUG_TX_QUEUES(mvm, | |
2151 | "Can't start tid %d agg on shared queue!\n", | |
2152 | tid); | |
2153 | goto release_locks; | |
2154 | } else if (!iwl_mvm_is_dqa_supported(mvm) || | |
2155 | mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) { | |
2156 | txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id, | |
2157 | mvm->first_agg_queue, | |
2158 | mvm->last_agg_queue); | |
2159 | if (txq_id < 0) { | |
2160 | ret = txq_id; | |
2161 | IWL_ERR(mvm, "Failed to allocate agg queue\n"); | |
2162 | goto release_locks; | |
2163 | } | |
2164 | ||
2165 | /* TXQ hasn't yet been enabled, so mark it only as reserved */ | |
2166 | mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED; | |
2167 | } | |
2168 | ||
2169 | spin_unlock(&mvm->queue_info_lock); | |
2170 | ||
2171 | IWL_DEBUG_TX_QUEUES(mvm, | |
2172 | "AGG for tid %d will be on queue #%d\n", | |
2173 | tid, txq_id); | |
2174 | ||
2175 | tid_data = &mvmsta->tid_data[tid]; | |
2176 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); | |
2177 | tid_data->txq_id = txq_id; | |
2178 | *ssn = tid_data->ssn; | |
2179 | ||
2180 | IWL_DEBUG_TX_QUEUES(mvm, | |
2181 | "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", | |
2182 | mvmsta->sta_id, tid, txq_id, tid_data->ssn, | |
2183 | tid_data->next_reclaimed); | |
2184 | ||
2185 | if (tid_data->ssn == tid_data->next_reclaimed) { | |
2186 | tid_data->state = IWL_AGG_STARTING; | |
2187 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
2188 | } else { | |
2189 | tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
2190 | } | |
2191 | ||
2192 | ret = 0; | |
2193 | goto out; | |
2194 | ||
2195 | release_locks: | |
2196 | spin_unlock(&mvm->queue_info_lock); | |
2197 | out: | |
2198 | spin_unlock_bh(&mvmsta->lock); | |
2199 | ||
2200 | return ret; | |
2201 | } | |
2202 | ||
2203 | int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
2204 | struct ieee80211_sta *sta, u16 tid, u8 buf_size, | |
2205 | bool amsdu) | |
2206 | { | |
2207 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2208 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
2209 | unsigned int wdg_timeout = | |
2210 | iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); | |
2211 | int queue, ret; | |
2212 | bool alloc_queue = true; | |
2213 | enum iwl_mvm_queue_status queue_status; | |
2214 | u16 ssn; | |
2215 | ||
2216 | struct iwl_trans_txq_scd_cfg cfg = { | |
2217 | .sta_id = mvmsta->sta_id, | |
2218 | .tid = tid, | |
2219 | .frame_limit = buf_size, | |
2220 | .aggregate = true, | |
2221 | }; | |
2222 | ||
2223 | BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) | |
2224 | != IWL_MAX_TID_COUNT); | |
2225 | ||
2226 | buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); | |
2227 | ||
2228 | spin_lock_bh(&mvmsta->lock); | |
2229 | ssn = tid_data->ssn; | |
2230 | queue = tid_data->txq_id; | |
2231 | tid_data->state = IWL_AGG_ON; | |
2232 | mvmsta->agg_tids |= BIT(tid); | |
2233 | tid_data->ssn = 0xffff; | |
2234 | tid_data->amsdu_in_ampdu_allowed = amsdu; | |
2235 | spin_unlock_bh(&mvmsta->lock); | |
2236 | ||
2237 | cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; | |
2238 | ||
2239 | spin_lock_bh(&mvm->queue_info_lock); | |
2240 | queue_status = mvm->queue_info[queue].status; | |
2241 | spin_unlock_bh(&mvm->queue_info_lock); | |
2242 | ||
2243 | /* In DQA mode, the existing queue might need to be reconfigured */ | |
2244 | if (iwl_mvm_is_dqa_supported(mvm)) { | |
2245 | /* Maybe there is no need to even alloc a queue... */ | |
2246 | if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY) | |
2247 | alloc_queue = false; | |
2248 | ||
2249 | /* | |
2250 | * Only reconfig the SCD for the queue if the window size has | |
2251 | * changed from current (become smaller) | |
2252 | */ | |
2253 | if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) { | |
2254 | /* | |
2255 | * If reconfiguring an existing queue, it first must be | |
2256 | * drained | |
2257 | */ | |
2258 | ret = iwl_trans_wait_tx_queue_empty(mvm->trans, | |
2259 | BIT(queue)); | |
2260 | if (ret) { | |
2261 | IWL_ERR(mvm, | |
2262 | "Error draining queue before reconfig\n"); | |
2263 | return ret; | |
2264 | } | |
2265 | ||
2266 | ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo, | |
2267 | mvmsta->sta_id, tid, | |
2268 | buf_size, ssn); | |
2269 | if (ret) { | |
2270 | IWL_ERR(mvm, | |
2271 | "Error reconfiguring TXQ #%d\n", queue); | |
2272 | return ret; | |
2273 | } | |
2274 | } | |
2275 | } | |
2276 | ||
2277 | if (alloc_queue) | |
2278 | iwl_mvm_enable_txq(mvm, queue, | |
2279 | vif->hw_queue[tid_to_mac80211_ac[tid]], ssn, | |
2280 | &cfg, wdg_timeout); | |
2281 | ||
2282 | /* Send ADD_STA command to enable aggs only if the queue isn't shared */ | |
2283 | if (queue_status != IWL_MVM_QUEUE_SHARED) { | |
2284 | ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); | |
2285 | if (ret) | |
2286 | return -EIO; | |
2287 | } | |
2288 | ||
2289 | /* No need to mark as reserved */ | |
2290 | spin_lock_bh(&mvm->queue_info_lock); | |
2291 | mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY; | |
2292 | spin_unlock_bh(&mvm->queue_info_lock); | |
2293 | ||
2294 | /* | |
2295 | * Even though in theory the peer could have different | |
2296 | * aggregation reorder buffer sizes for different sessions, | |
2297 | * our ucode doesn't allow for that and has a global limit | |
2298 | * for each station. Therefore, use the minimum of all the | |
2299 | * aggregation sessions and our default value. | |
2300 | */ | |
2301 | mvmsta->max_agg_bufsize = | |
2302 | min(mvmsta->max_agg_bufsize, buf_size); | |
2303 | mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
2304 | ||
2305 | IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", | |
2306 | sta->addr, tid); | |
2307 | ||
2308 | return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); | |
2309 | } | |
2310 | ||
2311 | int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
2312 | struct ieee80211_sta *sta, u16 tid) | |
2313 | { | |
2314 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2315 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
2316 | u16 txq_id; | |
2317 | int err; | |
2318 | ||
2319 | /* | |
2320 | * If mac80211 is cleaning its state, then say that we finished since | |
2321 | * our state has been cleared anyway. | |
2322 | */ | |
2323 | if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
2324 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
2325 | return 0; | |
2326 | } | |
2327 | ||
2328 | spin_lock_bh(&mvmsta->lock); | |
2329 | ||
2330 | txq_id = tid_data->txq_id; | |
2331 | ||
2332 | IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", | |
2333 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
2334 | ||
2335 | mvmsta->agg_tids &= ~BIT(tid); | |
2336 | ||
2337 | spin_lock_bh(&mvm->queue_info_lock); | |
2338 | /* | |
2339 | * The TXQ is marked as reserved only if no traffic came through yet | |
2340 | * This means no traffic has been sent on this TID (agg'd or not), so | |
2341 | * we no longer have use for the queue. Since it hasn't even been | |
2342 | * allocated through iwl_mvm_enable_txq, so we can just mark it back as | |
2343 | * free. | |
2344 | */ | |
2345 | if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) | |
2346 | mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; | |
2347 | ||
2348 | spin_unlock_bh(&mvm->queue_info_lock); | |
2349 | ||
2350 | switch (tid_data->state) { | |
2351 | case IWL_AGG_ON: | |
2352 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); | |
2353 | ||
2354 | IWL_DEBUG_TX_QUEUES(mvm, | |
2355 | "ssn = %d, next_recl = %d\n", | |
2356 | tid_data->ssn, tid_data->next_reclaimed); | |
2357 | ||
2358 | /* There are still packets for this RA / TID in the HW */ | |
2359 | if (tid_data->ssn != tid_data->next_reclaimed) { | |
2360 | tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; | |
2361 | err = 0; | |
2362 | break; | |
2363 | } | |
2364 | ||
2365 | tid_data->ssn = 0xffff; | |
2366 | tid_data->state = IWL_AGG_OFF; | |
2367 | spin_unlock_bh(&mvmsta->lock); | |
2368 | ||
2369 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
2370 | ||
2371 | iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); | |
2372 | ||
2373 | if (!iwl_mvm_is_dqa_supported(mvm)) { | |
2374 | int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; | |
2375 | ||
2376 | iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0); | |
2377 | } | |
2378 | return 0; | |
2379 | case IWL_AGG_STARTING: | |
2380 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
2381 | /* | |
2382 | * The agg session has been stopped before it was set up. This | |
2383 | * can happen when the AddBA timer times out for example. | |
2384 | */ | |
2385 | ||
2386 | /* No barriers since we are under mutex */ | |
2387 | lockdep_assert_held(&mvm->mutex); | |
2388 | ||
2389 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
2390 | tid_data->state = IWL_AGG_OFF; | |
2391 | err = 0; | |
2392 | break; | |
2393 | default: | |
2394 | IWL_ERR(mvm, | |
2395 | "Stopping AGG while state not ON or starting for %d on %d (%d)\n", | |
2396 | mvmsta->sta_id, tid, tid_data->state); | |
2397 | IWL_ERR(mvm, | |
2398 | "\ttid_data->txq_id = %d\n", tid_data->txq_id); | |
2399 | err = -EINVAL; | |
2400 | } | |
2401 | ||
2402 | spin_unlock_bh(&mvmsta->lock); | |
2403 | ||
2404 | return err; | |
2405 | } | |
2406 | ||
2407 | int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
2408 | struct ieee80211_sta *sta, u16 tid) | |
2409 | { | |
2410 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2411 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
2412 | u16 txq_id; | |
2413 | enum iwl_mvm_agg_state old_state; | |
2414 | ||
2415 | /* | |
2416 | * First set the agg state to OFF to avoid calling | |
2417 | * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. | |
2418 | */ | |
2419 | spin_lock_bh(&mvmsta->lock); | |
2420 | txq_id = tid_data->txq_id; | |
2421 | IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", | |
2422 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
2423 | old_state = tid_data->state; | |
2424 | tid_data->state = IWL_AGG_OFF; | |
2425 | mvmsta->agg_tids &= ~BIT(tid); | |
2426 | spin_unlock_bh(&mvmsta->lock); | |
2427 | ||
2428 | spin_lock_bh(&mvm->queue_info_lock); | |
2429 | /* | |
2430 | * The TXQ is marked as reserved only if no traffic came through yet | |
2431 | * This means no traffic has been sent on this TID (agg'd or not), so | |
2432 | * we no longer have use for the queue. Since it hasn't even been | |
2433 | * allocated through iwl_mvm_enable_txq, so we can just mark it back as | |
2434 | * free. | |
2435 | */ | |
2436 | if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) | |
2437 | mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE; | |
2438 | spin_unlock_bh(&mvm->queue_info_lock); | |
2439 | ||
2440 | if (old_state >= IWL_AGG_ON) { | |
2441 | iwl_mvm_drain_sta(mvm, mvmsta, true); | |
2442 | if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0)) | |
2443 | IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); | |
2444 | iwl_trans_wait_tx_queue_empty(mvm->trans, | |
2445 | mvmsta->tfd_queue_msk); | |
2446 | iwl_mvm_drain_sta(mvm, mvmsta, false); | |
2447 | ||
2448 | iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); | |
2449 | ||
2450 | if (!iwl_mvm_is_dqa_supported(mvm)) { | |
2451 | int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]]; | |
2452 | ||
2453 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue, | |
2454 | tid, 0); | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | return 0; | |
2459 | } | |
2460 | ||
2461 | static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) | |
2462 | { | |
2463 | int i, max = -1, max_offs = -1; | |
2464 | ||
2465 | lockdep_assert_held(&mvm->mutex); | |
2466 | ||
2467 | /* Pick the unused key offset with the highest 'deleted' | |
2468 | * counter. Every time a key is deleted, all the counters | |
2469 | * are incremented and the one that was just deleted is | |
2470 | * reset to zero. Thus, the highest counter is the one | |
2471 | * that was deleted longest ago. Pick that one. | |
2472 | */ | |
2473 | for (i = 0; i < STA_KEY_MAX_NUM; i++) { | |
2474 | if (test_bit(i, mvm->fw_key_table)) | |
2475 | continue; | |
2476 | if (mvm->fw_key_deleted[i] > max) { | |
2477 | max = mvm->fw_key_deleted[i]; | |
2478 | max_offs = i; | |
2479 | } | |
2480 | } | |
2481 | ||
2482 | if (max_offs < 0) | |
2483 | return STA_KEY_IDX_INVALID; | |
2484 | ||
2485 | return max_offs; | |
2486 | } | |
2487 | ||
2488 | static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm, | |
2489 | struct ieee80211_vif *vif, | |
2490 | struct ieee80211_sta *sta) | |
2491 | { | |
2492 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
2493 | ||
2494 | if (sta) | |
2495 | return iwl_mvm_sta_from_mac80211(sta); | |
2496 | ||
2497 | /* | |
2498 | * The device expects GTKs for station interfaces to be | |
2499 | * installed as GTKs for the AP station. If we have no | |
2500 | * station ID, then use AP's station ID. | |
2501 | */ | |
2502 | if (vif->type == NL80211_IFTYPE_STATION && | |
2503 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { | |
2504 | u8 sta_id = mvmvif->ap_sta_id; | |
2505 | ||
2506 | sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id], | |
2507 | lockdep_is_held(&mvm->mutex)); | |
2508 | ||
2509 | /* | |
2510 | * It is possible that the 'sta' parameter is NULL, | |
2511 | * for example when a GTK is removed - the sta_id will then | |
2512 | * be the AP ID, and no station was passed by mac80211. | |
2513 | */ | |
2514 | if (IS_ERR_OR_NULL(sta)) | |
2515 | return NULL; | |
2516 | ||
2517 | return iwl_mvm_sta_from_mac80211(sta); | |
2518 | } | |
2519 | ||
2520 | return NULL; | |
2521 | } | |
2522 | ||
2523 | static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, | |
2524 | struct iwl_mvm_sta *mvm_sta, | |
2525 | struct ieee80211_key_conf *keyconf, bool mcast, | |
2526 | u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags, | |
2527 | u8 key_offset) | |
2528 | { | |
2529 | struct iwl_mvm_add_sta_key_cmd cmd = {}; | |
2530 | __le16 key_flags; | |
2531 | int ret; | |
2532 | u32 status; | |
2533 | u16 keyidx; | |
2534 | int i; | |
2535 | u8 sta_id = mvm_sta->sta_id; | |
2536 | ||
2537 | keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
2538 | STA_KEY_FLG_KEYID_MSK; | |
2539 | key_flags = cpu_to_le16(keyidx); | |
2540 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); | |
2541 | ||
2542 | switch (keyconf->cipher) { | |
2543 | case WLAN_CIPHER_SUITE_TKIP: | |
2544 | key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); | |
2545 | cmd.tkip_rx_tsc_byte2 = tkip_iv32; | |
2546 | for (i = 0; i < 5; i++) | |
2547 | cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); | |
2548 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
2549 | break; | |
2550 | case WLAN_CIPHER_SUITE_CCMP: | |
2551 | key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); | |
2552 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
2553 | break; | |
2554 | case WLAN_CIPHER_SUITE_WEP104: | |
2555 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); | |
2556 | /* fall through */ | |
2557 | case WLAN_CIPHER_SUITE_WEP40: | |
2558 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); | |
2559 | memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); | |
2560 | break; | |
2561 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2562 | key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES); | |
2563 | /* fall through */ | |
2564 | case WLAN_CIPHER_SUITE_GCMP: | |
2565 | key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP); | |
2566 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
2567 | break; | |
2568 | default: | |
2569 | key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); | |
2570 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
2571 | } | |
2572 | ||
2573 | if (mcast) | |
2574 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
2575 | ||
2576 | cmd.key_offset = key_offset; | |
2577 | cmd.key_flags = key_flags; | |
2578 | cmd.sta_id = sta_id; | |
2579 | ||
2580 | status = ADD_STA_SUCCESS; | |
2581 | if (cmd_flags & CMD_ASYNC) | |
2582 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, | |
2583 | sizeof(cmd), &cmd); | |
2584 | else | |
2585 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), | |
2586 | &cmd, &status); | |
2587 | ||
2588 | switch (status) { | |
2589 | case ADD_STA_SUCCESS: | |
2590 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); | |
2591 | break; | |
2592 | default: | |
2593 | ret = -EIO; | |
2594 | IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); | |
2595 | break; | |
2596 | } | |
2597 | ||
2598 | return ret; | |
2599 | } | |
2600 | ||
2601 | static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, | |
2602 | struct ieee80211_key_conf *keyconf, | |
2603 | u8 sta_id, bool remove_key) | |
2604 | { | |
2605 | struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; | |
2606 | ||
2607 | /* verify the key details match the required command's expectations */ | |
2608 | if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || | |
2609 | (keyconf->keyidx != 4 && keyconf->keyidx != 5) || | |
2610 | (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC && | |
2611 | keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 && | |
2612 | keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256))) | |
2613 | return -EINVAL; | |
2614 | ||
2615 | if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) && | |
2616 | keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC)) | |
2617 | return -EINVAL; | |
2618 | ||
2619 | igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); | |
2620 | igtk_cmd.sta_id = cpu_to_le32(sta_id); | |
2621 | ||
2622 | if (remove_key) { | |
2623 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); | |
2624 | } else { | |
2625 | struct ieee80211_key_seq seq; | |
2626 | const u8 *pn; | |
2627 | ||
2628 | switch (keyconf->cipher) { | |
2629 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
2630 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM); | |
2631 | break; | |
2632 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
2633 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
2634 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP); | |
2635 | break; | |
2636 | default: | |
2637 | return -EINVAL; | |
2638 | } | |
2639 | ||
2640 | memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen); | |
2641 | if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) | |
2642 | igtk_cmd.ctrl_flags |= | |
2643 | cpu_to_le32(STA_KEY_FLG_KEY_32BYTES); | |
2644 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
2645 | pn = seq.aes_cmac.pn; | |
2646 | igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | | |
2647 | ((u64) pn[4] << 8) | | |
2648 | ((u64) pn[3] << 16) | | |
2649 | ((u64) pn[2] << 24) | | |
2650 | ((u64) pn[1] << 32) | | |
2651 | ((u64) pn[0] << 40)); | |
2652 | } | |
2653 | ||
2654 | IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", | |
2655 | remove_key ? "removing" : "installing", | |
2656 | igtk_cmd.sta_id); | |
2657 | ||
2658 | if (!iwl_mvm_has_new_rx_api(mvm)) { | |
2659 | struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = { | |
2660 | .ctrl_flags = igtk_cmd.ctrl_flags, | |
2661 | .key_id = igtk_cmd.key_id, | |
2662 | .sta_id = igtk_cmd.sta_id, | |
2663 | .receive_seq_cnt = igtk_cmd.receive_seq_cnt | |
2664 | }; | |
2665 | ||
2666 | memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk, | |
2667 | ARRAY_SIZE(igtk_cmd_v1.igtk)); | |
2668 | return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, | |
2669 | sizeof(igtk_cmd_v1), &igtk_cmd_v1); | |
2670 | } | |
2671 | return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, | |
2672 | sizeof(igtk_cmd), &igtk_cmd); | |
2673 | } | |
2674 | ||
2675 | ||
2676 | static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, | |
2677 | struct ieee80211_vif *vif, | |
2678 | struct ieee80211_sta *sta) | |
2679 | { | |
2680 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
2681 | ||
2682 | if (sta) | |
2683 | return sta->addr; | |
2684 | ||
2685 | if (vif->type == NL80211_IFTYPE_STATION && | |
2686 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { | |
2687 | u8 sta_id = mvmvif->ap_sta_id; | |
2688 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
2689 | lockdep_is_held(&mvm->mutex)); | |
2690 | return sta->addr; | |
2691 | } | |
2692 | ||
2693 | ||
2694 | return NULL; | |
2695 | } | |
2696 | ||
2697 | static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
2698 | struct ieee80211_vif *vif, | |
2699 | struct ieee80211_sta *sta, | |
2700 | struct ieee80211_key_conf *keyconf, | |
2701 | u8 key_offset, | |
2702 | bool mcast) | |
2703 | { | |
2704 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
2705 | int ret; | |
2706 | const u8 *addr; | |
2707 | struct ieee80211_key_seq seq; | |
2708 | u16 p1k[5]; | |
2709 | ||
2710 | switch (keyconf->cipher) { | |
2711 | case WLAN_CIPHER_SUITE_TKIP: | |
2712 | addr = iwl_mvm_get_mac_addr(mvm, vif, sta); | |
2713 | /* get phase 1 key from mac80211 */ | |
2714 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
2715 | ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); | |
2716 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
2717 | seq.tkip.iv32, p1k, 0, key_offset); | |
2718 | break; | |
2719 | case WLAN_CIPHER_SUITE_CCMP: | |
2720 | case WLAN_CIPHER_SUITE_WEP40: | |
2721 | case WLAN_CIPHER_SUITE_WEP104: | |
2722 | case WLAN_CIPHER_SUITE_GCMP: | |
2723 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2724 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
2725 | 0, NULL, 0, key_offset); | |
2726 | break; | |
2727 | default: | |
2728 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
2729 | 0, NULL, 0, key_offset); | |
2730 | } | |
2731 | ||
2732 | return ret; | |
2733 | } | |
2734 | ||
2735 | static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, | |
2736 | struct ieee80211_key_conf *keyconf, | |
2737 | bool mcast) | |
2738 | { | |
2739 | struct iwl_mvm_add_sta_key_cmd cmd = {}; | |
2740 | __le16 key_flags; | |
2741 | int ret; | |
2742 | u32 status; | |
2743 | ||
2744 | key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
2745 | STA_KEY_FLG_KEYID_MSK); | |
2746 | key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); | |
2747 | key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); | |
2748 | ||
2749 | if (mcast) | |
2750 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
2751 | ||
2752 | cmd.key_flags = key_flags; | |
2753 | cmd.key_offset = keyconf->hw_key_idx; | |
2754 | cmd.sta_id = sta_id; | |
2755 | ||
2756 | status = ADD_STA_SUCCESS; | |
2757 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), | |
2758 | &cmd, &status); | |
2759 | ||
2760 | switch (status) { | |
2761 | case ADD_STA_SUCCESS: | |
2762 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); | |
2763 | break; | |
2764 | default: | |
2765 | ret = -EIO; | |
2766 | IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); | |
2767 | break; | |
2768 | } | |
2769 | ||
2770 | return ret; | |
2771 | } | |
2772 | ||
2773 | int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
2774 | struct ieee80211_vif *vif, | |
2775 | struct ieee80211_sta *sta, | |
2776 | struct ieee80211_key_conf *keyconf, | |
2777 | u8 key_offset) | |
2778 | { | |
2779 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
2780 | struct iwl_mvm_sta *mvm_sta; | |
2781 | u8 sta_id; | |
2782 | int ret; | |
2783 | static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0}; | |
2784 | ||
2785 | lockdep_assert_held(&mvm->mutex); | |
2786 | ||
2787 | /* Get the station id from the mvm local station table */ | |
2788 | mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); | |
2789 | if (!mvm_sta) { | |
2790 | IWL_ERR(mvm, "Failed to find station\n"); | |
2791 | return -EINVAL; | |
2792 | } | |
2793 | sta_id = mvm_sta->sta_id; | |
2794 | ||
2795 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || | |
2796 | keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || | |
2797 | keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) { | |
2798 | ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); | |
2799 | goto end; | |
2800 | } | |
2801 | ||
2802 | /* | |
2803 | * It is possible that the 'sta' parameter is NULL, and thus | |
2804 | * there is a need to retrieve the sta from the local station table. | |
2805 | */ | |
2806 | if (!sta) { | |
2807 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
2808 | lockdep_is_held(&mvm->mutex)); | |
2809 | if (IS_ERR_OR_NULL(sta)) { | |
2810 | IWL_ERR(mvm, "Invalid station id\n"); | |
2811 | return -EINVAL; | |
2812 | } | |
2813 | } | |
2814 | ||
2815 | if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) | |
2816 | return -EINVAL; | |
2817 | ||
2818 | /* If the key_offset is not pre-assigned, we need to find a | |
2819 | * new offset to use. In normal cases, the offset is not | |
2820 | * pre-assigned, but during HW_RESTART we want to reuse the | |
2821 | * same indices, so we pass them when this function is called. | |
2822 | * | |
2823 | * In D3 entry, we need to hardcoded the indices (because the | |
2824 | * firmware hardcodes the PTK offset to 0). In this case, we | |
2825 | * need to make sure we don't overwrite the hw_key_idx in the | |
2826 | * keyconf structure, because otherwise we cannot configure | |
2827 | * the original ones back when resuming. | |
2828 | */ | |
2829 | if (key_offset == STA_KEY_IDX_INVALID) { | |
2830 | key_offset = iwl_mvm_set_fw_key_idx(mvm); | |
2831 | if (key_offset == STA_KEY_IDX_INVALID) | |
2832 | return -ENOSPC; | |
2833 | keyconf->hw_key_idx = key_offset; | |
2834 | } | |
2835 | ||
2836 | ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast); | |
2837 | if (ret) | |
2838 | goto end; | |
2839 | ||
2840 | /* | |
2841 | * For WEP, the same key is used for multicast and unicast. Upload it | |
2842 | * again, using the same key offset, and now pointing the other one | |
2843 | * to the same key slot (offset). | |
2844 | * If this fails, remove the original as well. | |
2845 | */ | |
2846 | if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || | |
2847 | keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { | |
2848 | ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, | |
2849 | key_offset, !mcast); | |
2850 | if (ret) { | |
2851 | __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); | |
2852 | goto end; | |
2853 | } | |
2854 | } | |
2855 | ||
2856 | __set_bit(key_offset, mvm->fw_key_table); | |
2857 | ||
2858 | end: | |
2859 | IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", | |
2860 | keyconf->cipher, keyconf->keylen, keyconf->keyidx, | |
2861 | sta ? sta->addr : zero_addr, ret); | |
2862 | return ret; | |
2863 | } | |
2864 | ||
2865 | int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, | |
2866 | struct ieee80211_vif *vif, | |
2867 | struct ieee80211_sta *sta, | |
2868 | struct ieee80211_key_conf *keyconf) | |
2869 | { | |
2870 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
2871 | struct iwl_mvm_sta *mvm_sta; | |
2872 | u8 sta_id = IWL_MVM_STATION_COUNT; | |
2873 | int ret, i; | |
2874 | ||
2875 | lockdep_assert_held(&mvm->mutex); | |
2876 | ||
2877 | /* Get the station from the mvm local station table */ | |
2878 | mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); | |
2879 | ||
2880 | IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", | |
2881 | keyconf->keyidx, sta_id); | |
2882 | ||
2883 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC || | |
2884 | keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || | |
2885 | keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) | |
2886 | return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); | |
2887 | ||
2888 | if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { | |
2889 | IWL_ERR(mvm, "offset %d not used in fw key table.\n", | |
2890 | keyconf->hw_key_idx); | |
2891 | return -ENOENT; | |
2892 | } | |
2893 | ||
2894 | /* track which key was deleted last */ | |
2895 | for (i = 0; i < STA_KEY_MAX_NUM; i++) { | |
2896 | if (mvm->fw_key_deleted[i] < U8_MAX) | |
2897 | mvm->fw_key_deleted[i]++; | |
2898 | } | |
2899 | mvm->fw_key_deleted[keyconf->hw_key_idx] = 0; | |
2900 | ||
2901 | if (!mvm_sta) { | |
2902 | IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); | |
2903 | return 0; | |
2904 | } | |
2905 | ||
2906 | sta_id = mvm_sta->sta_id; | |
2907 | ||
2908 | ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); | |
2909 | if (ret) | |
2910 | return ret; | |
2911 | ||
2912 | /* delete WEP key twice to get rid of (now useless) offset */ | |
2913 | if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || | |
2914 | keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) | |
2915 | ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); | |
2916 | ||
2917 | return ret; | |
2918 | } | |
2919 | ||
2920 | void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, | |
2921 | struct ieee80211_vif *vif, | |
2922 | struct ieee80211_key_conf *keyconf, | |
2923 | struct ieee80211_sta *sta, u32 iv32, | |
2924 | u16 *phase1key) | |
2925 | { | |
2926 | struct iwl_mvm_sta *mvm_sta; | |
2927 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
2928 | ||
2929 | rcu_read_lock(); | |
2930 | ||
2931 | mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta); | |
2932 | if (WARN_ON_ONCE(!mvm_sta)) | |
2933 | goto unlock; | |
2934 | iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
2935 | iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx); | |
2936 | ||
2937 | unlock: | |
2938 | rcu_read_unlock(); | |
2939 | } | |
2940 | ||
2941 | void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, | |
2942 | struct ieee80211_sta *sta) | |
2943 | { | |
2944 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2945 | struct iwl_mvm_add_sta_cmd cmd = { | |
2946 | .add_modify = STA_MODE_MODIFY, | |
2947 | .sta_id = mvmsta->sta_id, | |
2948 | .station_flags_msk = cpu_to_le32(STA_FLG_PS), | |
2949 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
2950 | }; | |
2951 | int ret; | |
2952 | ||
2953 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, | |
2954 | iwl_mvm_add_sta_cmd_size(mvm), &cmd); | |
2955 | if (ret) | |
2956 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
2957 | } | |
2958 | ||
2959 | void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, | |
2960 | struct ieee80211_sta *sta, | |
2961 | enum ieee80211_frame_release_type reason, | |
2962 | u16 cnt, u16 tids, bool more_data, | |
2963 | bool agg) | |
2964 | { | |
2965 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
2966 | struct iwl_mvm_add_sta_cmd cmd = { | |
2967 | .add_modify = STA_MODE_MODIFY, | |
2968 | .sta_id = mvmsta->sta_id, | |
2969 | .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, | |
2970 | .sleep_tx_count = cpu_to_le16(cnt), | |
2971 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
2972 | }; | |
2973 | int tid, ret; | |
2974 | unsigned long _tids = tids; | |
2975 | ||
2976 | /* convert TIDs to ACs - we don't support TSPEC so that's OK | |
2977 | * Note that this field is reserved and unused by firmware not | |
2978 | * supporting GO uAPSD, so it's safe to always do this. | |
2979 | */ | |
2980 | for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) | |
2981 | cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); | |
2982 | ||
2983 | /* If we're releasing frames from aggregation queues then check if the | |
2984 | * all queues combined that we're releasing frames from have | |
2985 | * - more frames than the service period, in which case more_data | |
2986 | * needs to be set | |
2987 | * - fewer than 'cnt' frames, in which case we need to adjust the | |
2988 | * firmware command (but do that unconditionally) | |
2989 | */ | |
2990 | if (agg) { | |
2991 | int remaining = cnt; | |
2992 | int sleep_tx_count; | |
2993 | ||
2994 | spin_lock_bh(&mvmsta->lock); | |
2995 | for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { | |
2996 | struct iwl_mvm_tid_data *tid_data; | |
2997 | u16 n_queued; | |
2998 | ||
2999 | tid_data = &mvmsta->tid_data[tid]; | |
3000 | if (WARN(tid_data->state != IWL_AGG_ON && | |
3001 | tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, | |
3002 | "TID %d state is %d\n", | |
3003 | tid, tid_data->state)) { | |
3004 | spin_unlock_bh(&mvmsta->lock); | |
3005 | ieee80211_sta_eosp(sta); | |
3006 | return; | |
3007 | } | |
3008 | ||
3009 | n_queued = iwl_mvm_tid_queued(tid_data); | |
3010 | if (n_queued > remaining) { | |
3011 | more_data = true; | |
3012 | remaining = 0; | |
3013 | break; | |
3014 | } | |
3015 | remaining -= n_queued; | |
3016 | } | |
3017 | sleep_tx_count = cnt - remaining; | |
3018 | if (reason == IEEE80211_FRAME_RELEASE_UAPSD) | |
3019 | mvmsta->sleep_tx_count = sleep_tx_count; | |
3020 | spin_unlock_bh(&mvmsta->lock); | |
3021 | ||
3022 | cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count); | |
3023 | if (WARN_ON(cnt - remaining == 0)) { | |
3024 | ieee80211_sta_eosp(sta); | |
3025 | return; | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | /* Note: this is ignored by firmware not supporting GO uAPSD */ | |
3030 | if (more_data) | |
3031 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); | |
3032 | ||
3033 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { | |
3034 | mvmsta->next_status_eosp = true; | |
3035 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); | |
3036 | } else { | |
3037 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); | |
3038 | } | |
3039 | ||
3040 | /* block the Tx queues until the FW updated the sleep Tx count */ | |
3041 | iwl_trans_block_txq_ptrs(mvm->trans, true); | |
3042 | ||
3043 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, | |
3044 | CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK, | |
3045 | iwl_mvm_add_sta_cmd_size(mvm), &cmd); | |
3046 | if (ret) | |
3047 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
3048 | } | |
3049 | ||
3050 | void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, | |
3051 | struct iwl_rx_cmd_buffer *rxb) | |
3052 | { | |
3053 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
3054 | struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; | |
3055 | struct ieee80211_sta *sta; | |
3056 | u32 sta_id = le32_to_cpu(notif->sta_id); | |
3057 | ||
3058 | if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) | |
3059 | return; | |
3060 | ||
3061 | rcu_read_lock(); | |
3062 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
3063 | if (!IS_ERR_OR_NULL(sta)) | |
3064 | ieee80211_sta_eosp(sta); | |
3065 | rcu_read_unlock(); | |
3066 | } | |
3067 | ||
3068 | void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, | |
3069 | struct iwl_mvm_sta *mvmsta, bool disable) | |
3070 | { | |
3071 | struct iwl_mvm_add_sta_cmd cmd = { | |
3072 | .add_modify = STA_MODE_MODIFY, | |
3073 | .sta_id = mvmsta->sta_id, | |
3074 | .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, | |
3075 | .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), | |
3076 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
3077 | }; | |
3078 | int ret; | |
3079 | ||
3080 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, | |
3081 | iwl_mvm_add_sta_cmd_size(mvm), &cmd); | |
3082 | if (ret) | |
3083 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
3084 | } | |
3085 | ||
3086 | void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, | |
3087 | struct ieee80211_sta *sta, | |
3088 | bool disable) | |
3089 | { | |
3090 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
3091 | ||
3092 | spin_lock_bh(&mvm_sta->lock); | |
3093 | ||
3094 | if (mvm_sta->disable_tx == disable) { | |
3095 | spin_unlock_bh(&mvm_sta->lock); | |
3096 | return; | |
3097 | } | |
3098 | ||
3099 | mvm_sta->disable_tx = disable; | |
3100 | ||
3101 | /* | |
3102 | * Tell mac80211 to start/stop queuing tx for this station, | |
3103 | * but don't stop queuing if there are still pending frames | |
3104 | * for this station. | |
3105 | */ | |
3106 | if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) | |
3107 | ieee80211_sta_block_awake(mvm->hw, sta, disable); | |
3108 | ||
3109 | iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); | |
3110 | ||
3111 | spin_unlock_bh(&mvm_sta->lock); | |
3112 | } | |
3113 | ||
3114 | void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, | |
3115 | struct iwl_mvm_vif *mvmvif, | |
3116 | bool disable) | |
3117 | { | |
3118 | struct ieee80211_sta *sta; | |
3119 | struct iwl_mvm_sta *mvm_sta; | |
3120 | int i; | |
3121 | ||
3122 | lockdep_assert_held(&mvm->mutex); | |
3123 | ||
3124 | /* Block/unblock all the stations of the given mvmvif */ | |
3125 | for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { | |
3126 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], | |
3127 | lockdep_is_held(&mvm->mutex)); | |
3128 | if (IS_ERR_OR_NULL(sta)) | |
3129 | continue; | |
3130 | ||
3131 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
3132 | if (mvm_sta->mac_id_n_color != | |
3133 | FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) | |
3134 | continue; | |
3135 | ||
3136 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); | |
3137 | } | |
3138 | } | |
3139 | ||
3140 | void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
3141 | { | |
3142 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
3143 | struct iwl_mvm_sta *mvmsta; | |
3144 | ||
3145 | rcu_read_lock(); | |
3146 | ||
3147 | mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); | |
3148 | ||
3149 | if (!WARN_ON(!mvmsta)) | |
3150 | iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); | |
3151 | ||
3152 | rcu_read_unlock(); | |
3153 | } |