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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 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
23 | * USA | |
24 | * | |
25 | * The full GNU General Public License is included in this distribution | |
26 | * in the file called COPYING. | |
27 | * | |
28 | * Contact Information: | |
29 | * Intel Linux Wireless <ilw@linux.intel.com> | |
30 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
31 | * | |
32 | * BSD LICENSE | |
33 | * | |
34 | * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved. | |
35 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH | |
36 | * All rights reserved. | |
37 | * | |
38 | * Redistribution and use in source and binary forms, with or without | |
39 | * modification, are permitted provided that the following conditions | |
40 | * are met: | |
41 | * | |
42 | * * Redistributions of source code must retain the above copyright | |
43 | * notice, this list of conditions and the following disclaimer. | |
44 | * * Redistributions in binary form must reproduce the above copyright | |
45 | * notice, this list of conditions and the following disclaimer in | |
46 | * the documentation and/or other materials provided with the | |
47 | * distribution. | |
48 | * * Neither the name Intel Corporation nor the names of its | |
49 | * contributors may be used to endorse or promote products derived | |
50 | * from this software without specific prior written permission. | |
51 | * | |
52 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
53 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
54 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
55 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
56 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
57 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
58 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
59 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
60 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
61 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
62 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
63 | * | |
64 | *****************************************************************************/ | |
65 | #include <net/mac80211.h> | |
66 | ||
67 | #include "mvm.h" | |
68 | #include "sta.h" | |
69 | #include "rs.h" | |
70 | ||
71 | static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, | |
72 | enum nl80211_iftype iftype) | |
73 | { | |
74 | int sta_id; | |
75 | u32 reserved_ids = 0; | |
76 | ||
77 | BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); | |
78 | WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); | |
79 | ||
80 | lockdep_assert_held(&mvm->mutex); | |
81 | ||
82 | /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ | |
83 | if (iftype != NL80211_IFTYPE_STATION) | |
84 | reserved_ids = BIT(0); | |
85 | ||
86 | /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ | |
87 | for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { | |
88 | if (BIT(sta_id) & reserved_ids) | |
89 | continue; | |
90 | ||
91 | if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
92 | lockdep_is_held(&mvm->mutex))) | |
93 | return sta_id; | |
94 | } | |
95 | return IWL_MVM_STATION_COUNT; | |
96 | } | |
97 | ||
98 | /* send station add/update command to firmware */ | |
99 | int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
100 | bool update) | |
101 | { | |
102 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
103 | struct iwl_mvm_add_sta_cmd add_sta_cmd = { | |
104 | .sta_id = mvm_sta->sta_id, | |
105 | .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), | |
106 | .add_modify = update ? 1 : 0, | |
107 | .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | | |
108 | STA_FLG_MIMO_EN_MSK), | |
109 | }; | |
110 | int ret; | |
111 | u32 status; | |
112 | u32 agg_size = 0, mpdu_dens = 0; | |
113 | ||
114 | if (!update) { | |
115 | add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
116 | memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); | |
117 | } | |
118 | ||
119 | switch (sta->bandwidth) { | |
120 | case IEEE80211_STA_RX_BW_160: | |
121 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); | |
122 | /* fall through */ | |
123 | case IEEE80211_STA_RX_BW_80: | |
124 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); | |
125 | /* fall through */ | |
126 | case IEEE80211_STA_RX_BW_40: | |
127 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); | |
128 | /* fall through */ | |
129 | case IEEE80211_STA_RX_BW_20: | |
130 | if (sta->ht_cap.ht_supported) | |
131 | add_sta_cmd.station_flags |= | |
132 | cpu_to_le32(STA_FLG_FAT_EN_20MHZ); | |
133 | break; | |
134 | } | |
135 | ||
136 | switch (sta->rx_nss) { | |
137 | case 1: | |
138 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
139 | break; | |
140 | case 2: | |
141 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); | |
142 | break; | |
143 | case 3 ... 8: | |
144 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); | |
145 | break; | |
146 | } | |
147 | ||
148 | switch (sta->smps_mode) { | |
149 | case IEEE80211_SMPS_AUTOMATIC: | |
150 | case IEEE80211_SMPS_NUM_MODES: | |
151 | WARN_ON(1); | |
152 | break; | |
153 | case IEEE80211_SMPS_STATIC: | |
154 | /* override NSS */ | |
155 | add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); | |
156 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
157 | break; | |
158 | case IEEE80211_SMPS_DYNAMIC: | |
159 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); | |
160 | break; | |
161 | case IEEE80211_SMPS_OFF: | |
162 | /* nothing */ | |
163 | break; | |
164 | } | |
165 | ||
166 | if (sta->ht_cap.ht_supported) { | |
167 | add_sta_cmd.station_flags_msk |= | |
168 | cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | | |
169 | STA_FLG_AGG_MPDU_DENS_MSK); | |
170 | ||
171 | mpdu_dens = sta->ht_cap.ampdu_density; | |
172 | } | |
173 | ||
174 | if (sta->vht_cap.vht_supported) { | |
175 | agg_size = sta->vht_cap.cap & | |
176 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
177 | agg_size >>= | |
178 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
179 | } else if (sta->ht_cap.ht_supported) { | |
180 | agg_size = sta->ht_cap.ampdu_factor; | |
181 | } | |
182 | ||
183 | add_sta_cmd.station_flags |= | |
184 | cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); | |
185 | add_sta_cmd.station_flags |= | |
186 | cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); | |
187 | ||
188 | status = ADD_STA_SUCCESS; | |
189 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd), | |
190 | &add_sta_cmd, &status); | |
191 | if (ret) | |
192 | return ret; | |
193 | ||
194 | switch (status) { | |
195 | case ADD_STA_SUCCESS: | |
196 | IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); | |
197 | break; | |
198 | default: | |
199 | ret = -EIO; | |
200 | IWL_ERR(mvm, "ADD_STA failed\n"); | |
201 | break; | |
202 | } | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, | |
208 | struct ieee80211_sta *sta) | |
209 | { | |
210 | unsigned long used_hw_queues; | |
211 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
212 | unsigned int wdg_timeout = | |
213 | iwl_mvm_get_wd_timeout(mvm, NULL, true, false); | |
214 | u32 ac; | |
215 | ||
216 | lockdep_assert_held(&mvm->mutex); | |
217 | ||
218 | used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); | |
219 | ||
220 | /* Find available queues, and allocate them to the ACs */ | |
221 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
222 | u8 queue = find_first_zero_bit(&used_hw_queues, | |
223 | mvm->first_agg_queue); | |
224 | ||
225 | if (queue >= mvm->first_agg_queue) { | |
226 | IWL_ERR(mvm, "Failed to allocate STA queue\n"); | |
227 | return -EBUSY; | |
228 | } | |
229 | ||
230 | __set_bit(queue, &used_hw_queues); | |
231 | mvmsta->hw_queue[ac] = queue; | |
232 | } | |
233 | ||
234 | /* Found a place for all queues - enable them */ | |
235 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
236 | iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], | |
237 | iwl_mvm_ac_to_tx_fifo[ac], wdg_timeout); | |
238 | mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); | |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, | |
245 | struct ieee80211_sta *sta) | |
246 | { | |
247 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
248 | unsigned long sta_msk; | |
249 | int i; | |
250 | ||
251 | lockdep_assert_held(&mvm->mutex); | |
252 | ||
253 | /* disable the TDLS STA-specific queues */ | |
254 | sta_msk = mvmsta->tfd_queue_msk; | |
255 | for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE) | |
256 | iwl_mvm_disable_txq(mvm, i, 0); | |
257 | } | |
258 | ||
259 | int iwl_mvm_add_sta(struct iwl_mvm *mvm, | |
260 | struct ieee80211_vif *vif, | |
261 | struct ieee80211_sta *sta) | |
262 | { | |
263 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
264 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
265 | int i, ret, sta_id; | |
266 | ||
267 | lockdep_assert_held(&mvm->mutex); | |
268 | ||
269 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) | |
270 | sta_id = iwl_mvm_find_free_sta_id(mvm, | |
271 | ieee80211_vif_type_p2p(vif)); | |
272 | else | |
273 | sta_id = mvm_sta->sta_id; | |
274 | ||
275 | if (sta_id == IWL_MVM_STATION_COUNT) | |
276 | return -ENOSPC; | |
277 | ||
278 | spin_lock_init(&mvm_sta->lock); | |
279 | ||
280 | mvm_sta->sta_id = sta_id; | |
281 | mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, | |
282 | mvmvif->color); | |
283 | mvm_sta->vif = vif; | |
284 | mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
285 | mvm_sta->tx_protection = 0; | |
286 | mvm_sta->tt_tx_protection = false; | |
287 | ||
288 | /* HW restart, don't assume the memory has been zeroed */ | |
289 | atomic_set(&mvm->pending_frames[sta_id], 0); | |
290 | mvm_sta->tid_disable_agg = 0; | |
291 | mvm_sta->tfd_queue_msk = 0; | |
292 | ||
293 | /* allocate new queues for a TDLS station */ | |
294 | if (sta->tdls) { | |
295 | ret = iwl_mvm_tdls_sta_init(mvm, sta); | |
296 | if (ret) | |
297 | return ret; | |
298 | } else { | |
299 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
300 | if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) | |
301 | mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); | |
302 | } | |
303 | ||
304 | /* for HW restart - reset everything but the sequence number */ | |
305 | for (i = 0; i < IWL_MAX_TID_COUNT; i++) { | |
306 | u16 seq = mvm_sta->tid_data[i].seq_number; | |
307 | memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); | |
308 | mvm_sta->tid_data[i].seq_number = seq; | |
309 | } | |
310 | mvm_sta->agg_tids = 0; | |
311 | ||
312 | ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); | |
313 | if (ret) | |
314 | goto err; | |
315 | ||
316 | if (vif->type == NL80211_IFTYPE_STATION) { | |
317 | if (!sta->tdls) { | |
318 | WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); | |
319 | mvmvif->ap_sta_id = sta_id; | |
320 | } else { | |
321 | WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); | |
322 | } | |
323 | } | |
324 | ||
325 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); | |
326 | ||
327 | return 0; | |
328 | ||
329 | err: | |
330 | iwl_mvm_tdls_sta_deinit(mvm, sta); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | int iwl_mvm_update_sta(struct iwl_mvm *mvm, | |
335 | struct ieee80211_vif *vif, | |
336 | struct ieee80211_sta *sta) | |
337 | { | |
338 | return iwl_mvm_sta_send_to_fw(mvm, sta, true); | |
339 | } | |
340 | ||
341 | int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, | |
342 | bool drain) | |
343 | { | |
344 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
345 | int ret; | |
346 | u32 status; | |
347 | ||
348 | lockdep_assert_held(&mvm->mutex); | |
349 | ||
350 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
351 | cmd.sta_id = mvmsta->sta_id; | |
352 | cmd.add_modify = STA_MODE_MODIFY; | |
353 | cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; | |
354 | cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); | |
355 | ||
356 | status = ADD_STA_SUCCESS; | |
357 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
358 | &cmd, &status); | |
359 | if (ret) | |
360 | return ret; | |
361 | ||
362 | switch (status) { | |
363 | case ADD_STA_SUCCESS: | |
364 | IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", | |
365 | mvmsta->sta_id); | |
366 | break; | |
367 | default: | |
368 | ret = -EIO; | |
369 | IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", | |
370 | mvmsta->sta_id); | |
371 | break; | |
372 | } | |
373 | ||
374 | return ret; | |
375 | } | |
376 | ||
377 | /* | |
378 | * Remove a station from the FW table. Before sending the command to remove | |
379 | * the station validate that the station is indeed known to the driver (sanity | |
380 | * only). | |
381 | */ | |
382 | static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) | |
383 | { | |
384 | struct ieee80211_sta *sta; | |
385 | struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { | |
386 | .sta_id = sta_id, | |
387 | }; | |
388 | int ret; | |
389 | ||
390 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
391 | lockdep_is_held(&mvm->mutex)); | |
392 | ||
393 | /* Note: internal stations are marked as error values */ | |
394 | if (!sta) { | |
395 | IWL_ERR(mvm, "Invalid station id\n"); | |
396 | return -EINVAL; | |
397 | } | |
398 | ||
399 | ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, | |
400 | sizeof(rm_sta_cmd), &rm_sta_cmd); | |
401 | if (ret) { | |
402 | IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); | |
403 | return ret; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | void iwl_mvm_sta_drained_wk(struct work_struct *wk) | |
410 | { | |
411 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); | |
412 | u8 sta_id; | |
413 | ||
414 | /* | |
415 | * The mutex is needed because of the SYNC cmd, but not only: if the | |
416 | * work would run concurrently with iwl_mvm_rm_sta, it would run before | |
417 | * iwl_mvm_rm_sta sets the station as busy, and exit. Then | |
418 | * iwl_mvm_rm_sta would set the station as busy, and nobody will clean | |
419 | * that later. | |
420 | */ | |
421 | mutex_lock(&mvm->mutex); | |
422 | ||
423 | for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { | |
424 | int ret; | |
425 | struct ieee80211_sta *sta = | |
426 | rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
427 | lockdep_is_held(&mvm->mutex)); | |
428 | ||
429 | /* | |
430 | * This station is in use or RCU-removed; the latter happens in | |
431 | * managed mode, where mac80211 removes the station before we | |
432 | * can remove it from firmware (we can only do that after the | |
433 | * MAC is marked unassociated), and possibly while the deauth | |
434 | * frame to disconnect from the AP is still queued. Then, the | |
435 | * station pointer is -ENOENT when the last skb is reclaimed. | |
436 | */ | |
437 | if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) | |
438 | continue; | |
439 | ||
440 | if (PTR_ERR(sta) == -EINVAL) { | |
441 | IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", | |
442 | sta_id); | |
443 | continue; | |
444 | } | |
445 | ||
446 | if (!sta) { | |
447 | IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", | |
448 | sta_id); | |
449 | continue; | |
450 | } | |
451 | ||
452 | WARN_ON(PTR_ERR(sta) != -EBUSY); | |
453 | /* This station was removed and we waited until it got drained, | |
454 | * we can now proceed and remove it. | |
455 | */ | |
456 | ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
457 | if (ret) { | |
458 | IWL_ERR(mvm, | |
459 | "Couldn't remove sta %d after it was drained\n", | |
460 | sta_id); | |
461 | continue; | |
462 | } | |
463 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); | |
464 | clear_bit(sta_id, mvm->sta_drained); | |
465 | ||
466 | if (mvm->tfd_drained[sta_id]) { | |
467 | unsigned long i, msk = mvm->tfd_drained[sta_id]; | |
468 | ||
469 | for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE) | |
470 | iwl_mvm_disable_txq(mvm, i, 0); | |
471 | ||
472 | mvm->tfd_drained[sta_id] = 0; | |
473 | IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", | |
474 | sta_id, msk); | |
475 | } | |
476 | } | |
477 | ||
478 | mutex_unlock(&mvm->mutex); | |
479 | } | |
480 | ||
481 | int iwl_mvm_rm_sta(struct iwl_mvm *mvm, | |
482 | struct ieee80211_vif *vif, | |
483 | struct ieee80211_sta *sta) | |
484 | { | |
485 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
486 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
487 | int ret; | |
488 | ||
489 | lockdep_assert_held(&mvm->mutex); | |
490 | ||
491 | if (vif->type == NL80211_IFTYPE_STATION && | |
492 | mvmvif->ap_sta_id == mvm_sta->sta_id) { | |
493 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
494 | if (ret) | |
495 | return ret; | |
496 | /* flush its queues here since we are freeing mvm_sta */ | |
497 | ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true); | |
498 | if (ret) | |
499 | return ret; | |
500 | ret = iwl_trans_wait_tx_queue_empty(mvm->trans, | |
501 | mvm_sta->tfd_queue_msk); | |
502 | if (ret) | |
503 | return ret; | |
504 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); | |
505 | ||
506 | /* if we are associated - we can't remove the AP STA now */ | |
507 | if (vif->bss_conf.assoc) | |
508 | return ret; | |
509 | ||
510 | /* unassoc - go ahead - remove the AP STA now */ | |
511 | mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; | |
512 | ||
513 | /* clear d0i3_ap_sta_id if no longer relevant */ | |
514 | if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) | |
515 | mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; | |
516 | } | |
517 | ||
518 | /* | |
519 | * This shouldn't happen - the TDLS channel switch should be canceled | |
520 | * before the STA is removed. | |
521 | */ | |
522 | if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { | |
523 | mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; | |
524 | cancel_delayed_work(&mvm->tdls_cs.dwork); | |
525 | } | |
526 | ||
527 | /* | |
528 | * Make sure that the tx response code sees the station as -EBUSY and | |
529 | * calls the drain worker. | |
530 | */ | |
531 | spin_lock_bh(&mvm_sta->lock); | |
532 | /* | |
533 | * There are frames pending on the AC queues for this station. | |
534 | * We need to wait until all the frames are drained... | |
535 | */ | |
536 | if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { | |
537 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], | |
538 | ERR_PTR(-EBUSY)); | |
539 | spin_unlock_bh(&mvm_sta->lock); | |
540 | ||
541 | /* disable TDLS sta queues on drain complete */ | |
542 | if (sta->tdls) { | |
543 | mvm->tfd_drained[mvm_sta->sta_id] = | |
544 | mvm_sta->tfd_queue_msk; | |
545 | IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", | |
546 | mvm_sta->sta_id); | |
547 | } | |
548 | ||
549 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
550 | } else { | |
551 | spin_unlock_bh(&mvm_sta->lock); | |
552 | ||
553 | if (sta->tdls) | |
554 | iwl_mvm_tdls_sta_deinit(mvm, sta); | |
555 | ||
556 | ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); | |
557 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); | |
558 | } | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
563 | int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, | |
564 | struct ieee80211_vif *vif, | |
565 | u8 sta_id) | |
566 | { | |
567 | int ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
568 | ||
569 | lockdep_assert_held(&mvm->mutex); | |
570 | ||
571 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, | |
576 | struct iwl_mvm_int_sta *sta, | |
577 | u32 qmask, enum nl80211_iftype iftype) | |
578 | { | |
579 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
580 | sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); | |
581 | if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) | |
582 | return -ENOSPC; | |
583 | } | |
584 | ||
585 | sta->tfd_queue_msk = qmask; | |
586 | ||
587 | /* put a non-NULL value so iterating over the stations won't stop */ | |
588 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); | |
589 | return 0; | |
590 | } | |
591 | ||
592 | static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, | |
593 | struct iwl_mvm_int_sta *sta) | |
594 | { | |
595 | RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); | |
596 | memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); | |
597 | sta->sta_id = IWL_MVM_STATION_COUNT; | |
598 | } | |
599 | ||
600 | static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, | |
601 | struct iwl_mvm_int_sta *sta, | |
602 | const u8 *addr, | |
603 | u16 mac_id, u16 color) | |
604 | { | |
605 | struct iwl_mvm_add_sta_cmd cmd; | |
606 | int ret; | |
607 | u32 status; | |
608 | ||
609 | lockdep_assert_held(&mvm->mutex); | |
610 | ||
611 | memset(&cmd, 0, sizeof(cmd)); | |
612 | cmd.sta_id = sta->sta_id; | |
613 | cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, | |
614 | color)); | |
615 | ||
616 | cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); | |
617 | ||
618 | if (addr) | |
619 | memcpy(cmd.addr, addr, ETH_ALEN); | |
620 | ||
621 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
622 | &cmd, &status); | |
623 | if (ret) | |
624 | return ret; | |
625 | ||
626 | switch (status) { | |
627 | case ADD_STA_SUCCESS: | |
628 | IWL_DEBUG_INFO(mvm, "Internal station added.\n"); | |
629 | return 0; | |
630 | default: | |
631 | ret = -EIO; | |
632 | IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", | |
633 | status); | |
634 | break; | |
635 | } | |
636 | return ret; | |
637 | } | |
638 | ||
639 | int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) | |
640 | { | |
641 | unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ? | |
642 | mvm->cfg->base_params->wd_timeout : | |
643 | IWL_WATCHDOG_DISABLED; | |
644 | int ret; | |
645 | ||
646 | lockdep_assert_held(&mvm->mutex); | |
647 | ||
648 | /* Map Aux queue to fifo - needs to happen before adding Aux station */ | |
649 | iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, | |
650 | IWL_MVM_TX_FIFO_MCAST, wdg_timeout); | |
651 | ||
652 | /* Allocate aux station and assign to it the aux queue */ | |
653 | ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), | |
654 | NL80211_IFTYPE_UNSPECIFIED); | |
655 | if (ret) | |
656 | return ret; | |
657 | ||
658 | ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, | |
659 | MAC_INDEX_AUX, 0); | |
660 | ||
661 | if (ret) | |
662 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
663 | return ret; | |
664 | } | |
665 | ||
666 | void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) | |
667 | { | |
668 | lockdep_assert_held(&mvm->mutex); | |
669 | ||
670 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
671 | } | |
672 | ||
673 | /* | |
674 | * Send the add station command for the vif's broadcast station. | |
675 | * Assumes that the station was already allocated. | |
676 | * | |
677 | * @mvm: the mvm component | |
678 | * @vif: the interface to which the broadcast station is added | |
679 | * @bsta: the broadcast station to add. | |
680 | */ | |
681 | int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
682 | { | |
683 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
684 | struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; | |
685 | static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
686 | const u8 *baddr = _baddr; | |
687 | ||
688 | lockdep_assert_held(&mvm->mutex); | |
689 | ||
690 | if (vif->type == NL80211_IFTYPE_ADHOC) | |
691 | baddr = vif->bss_conf.bssid; | |
692 | ||
693 | if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) | |
694 | return -ENOSPC; | |
695 | ||
696 | return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
697 | mvmvif->id, mvmvif->color); | |
698 | } | |
699 | ||
700 | /* Send the FW a request to remove the station from it's internal data | |
701 | * structures, but DO NOT remove the entry from the local data structures. */ | |
702 | int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
703 | { | |
704 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
705 | int ret; | |
706 | ||
707 | lockdep_assert_held(&mvm->mutex); | |
708 | ||
709 | ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); | |
710 | if (ret) | |
711 | IWL_WARN(mvm, "Failed sending remove station\n"); | |
712 | return ret; | |
713 | } | |
714 | ||
715 | int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
716 | { | |
717 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
718 | u32 qmask; | |
719 | ||
720 | lockdep_assert_held(&mvm->mutex); | |
721 | ||
722 | qmask = iwl_mvm_mac_get_queues_mask(vif); | |
723 | ||
724 | /* | |
725 | * The firmware defines the TFD queue mask to only be relevant | |
726 | * for *unicast* queues, so the multicast (CAB) queue shouldn't | |
727 | * be included. | |
728 | */ | |
729 | if (vif->type == NL80211_IFTYPE_AP) | |
730 | qmask &= ~BIT(vif->cab_queue); | |
731 | ||
732 | return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, | |
733 | ieee80211_vif_type_p2p(vif)); | |
734 | } | |
735 | ||
736 | /* Allocate a new station entry for the broadcast station to the given vif, | |
737 | * and send it to the FW. | |
738 | * Note that each P2P mac should have its own broadcast station. | |
739 | * | |
740 | * @mvm: the mvm component | |
741 | * @vif: the interface to which the broadcast station is added | |
742 | * @bsta: the broadcast station to add. */ | |
743 | int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
744 | { | |
745 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
746 | struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; | |
747 | int ret; | |
748 | ||
749 | lockdep_assert_held(&mvm->mutex); | |
750 | ||
751 | ret = iwl_mvm_alloc_bcast_sta(mvm, vif); | |
752 | if (ret) | |
753 | return ret; | |
754 | ||
755 | ret = iwl_mvm_send_add_bcast_sta(mvm, vif); | |
756 | ||
757 | if (ret) | |
758 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
759 | ||
760 | return ret; | |
761 | } | |
762 | ||
763 | void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
764 | { | |
765 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
766 | ||
767 | iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); | |
768 | } | |
769 | ||
770 | /* | |
771 | * Send the FW a request to remove the station from it's internal data | |
772 | * structures, and in addition remove it from the local data structure. | |
773 | */ | |
774 | int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
775 | { | |
776 | int ret; | |
777 | ||
778 | lockdep_assert_held(&mvm->mutex); | |
779 | ||
780 | ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); | |
781 | ||
782 | iwl_mvm_dealloc_bcast_sta(mvm, vif); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | #define IWL_MAX_RX_BA_SESSIONS 16 | |
788 | ||
789 | int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
790 | int tid, u16 ssn, bool start) | |
791 | { | |
792 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
793 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
794 | int ret; | |
795 | u32 status; | |
796 | ||
797 | lockdep_assert_held(&mvm->mutex); | |
798 | ||
799 | if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { | |
800 | IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); | |
801 | return -ENOSPC; | |
802 | } | |
803 | ||
804 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
805 | cmd.sta_id = mvm_sta->sta_id; | |
806 | cmd.add_modify = STA_MODE_MODIFY; | |
807 | if (start) { | |
808 | cmd.add_immediate_ba_tid = (u8) tid; | |
809 | cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
810 | } else { | |
811 | cmd.remove_immediate_ba_tid = (u8) tid; | |
812 | } | |
813 | cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : | |
814 | STA_MODIFY_REMOVE_BA_TID; | |
815 | ||
816 | status = ADD_STA_SUCCESS; | |
817 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
818 | &cmd, &status); | |
819 | if (ret) | |
820 | return ret; | |
821 | ||
822 | switch (status) { | |
823 | case ADD_STA_SUCCESS: | |
824 | IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", | |
825 | start ? "start" : "stopp"); | |
826 | break; | |
827 | case ADD_STA_IMMEDIATE_BA_FAILURE: | |
828 | IWL_WARN(mvm, "RX BA Session refused by fw\n"); | |
829 | ret = -ENOSPC; | |
830 | break; | |
831 | default: | |
832 | ret = -EIO; | |
833 | IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", | |
834 | start ? "start" : "stopp", status); | |
835 | break; | |
836 | } | |
837 | ||
838 | if (!ret) { | |
839 | if (start) | |
840 | mvm->rx_ba_sessions++; | |
841 | else if (mvm->rx_ba_sessions > 0) | |
842 | /* check that restart flow didn't zero the counter */ | |
843 | mvm->rx_ba_sessions--; | |
844 | } | |
845 | ||
846 | return ret; | |
847 | } | |
848 | ||
849 | static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
850 | int tid, u8 queue, bool start) | |
851 | { | |
852 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
853 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
854 | int ret; | |
855 | u32 status; | |
856 | ||
857 | lockdep_assert_held(&mvm->mutex); | |
858 | ||
859 | if (start) { | |
860 | mvm_sta->tfd_queue_msk |= BIT(queue); | |
861 | mvm_sta->tid_disable_agg &= ~BIT(tid); | |
862 | } else { | |
863 | mvm_sta->tfd_queue_msk &= ~BIT(queue); | |
864 | mvm_sta->tid_disable_agg |= BIT(tid); | |
865 | } | |
866 | ||
867 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
868 | cmd.sta_id = mvm_sta->sta_id; | |
869 | cmd.add_modify = STA_MODE_MODIFY; | |
870 | cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; | |
871 | cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
872 | cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); | |
873 | ||
874 | status = ADD_STA_SUCCESS; | |
875 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
876 | &cmd, &status); | |
877 | if (ret) | |
878 | return ret; | |
879 | ||
880 | switch (status) { | |
881 | case ADD_STA_SUCCESS: | |
882 | break; | |
883 | default: | |
884 | ret = -EIO; | |
885 | IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", | |
886 | start ? "start" : "stopp", status); | |
887 | break; | |
888 | } | |
889 | ||
890 | return ret; | |
891 | } | |
892 | ||
893 | const u8 tid_to_mac80211_ac[] = { | |
894 | IEEE80211_AC_BE, | |
895 | IEEE80211_AC_BK, | |
896 | IEEE80211_AC_BK, | |
897 | IEEE80211_AC_BE, | |
898 | IEEE80211_AC_VI, | |
899 | IEEE80211_AC_VI, | |
900 | IEEE80211_AC_VO, | |
901 | IEEE80211_AC_VO, | |
902 | }; | |
903 | ||
904 | static const u8 tid_to_ucode_ac[] = { | |
905 | AC_BE, | |
906 | AC_BK, | |
907 | AC_BK, | |
908 | AC_BE, | |
909 | AC_VI, | |
910 | AC_VI, | |
911 | AC_VO, | |
912 | AC_VO, | |
913 | }; | |
914 | ||
915 | int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
916 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
917 | { | |
918 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
919 | struct iwl_mvm_tid_data *tid_data; | |
920 | int txq_id; | |
921 | ||
922 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
923 | return -EINVAL; | |
924 | ||
925 | if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { | |
926 | IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", | |
927 | mvmsta->tid_data[tid].state); | |
928 | return -ENXIO; | |
929 | } | |
930 | ||
931 | lockdep_assert_held(&mvm->mutex); | |
932 | ||
933 | for (txq_id = mvm->first_agg_queue; | |
934 | txq_id <= mvm->last_agg_queue; txq_id++) | |
935 | if (mvm->queue_to_mac80211[txq_id] == | |
936 | IWL_INVALID_MAC80211_QUEUE) | |
937 | break; | |
938 | ||
939 | if (txq_id > mvm->last_agg_queue) { | |
940 | IWL_ERR(mvm, "Failed to allocate agg queue\n"); | |
941 | return -EIO; | |
942 | } | |
943 | ||
944 | spin_lock_bh(&mvmsta->lock); | |
945 | ||
946 | /* possible race condition - we entered D0i3 while starting agg */ | |
947 | if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { | |
948 | spin_unlock_bh(&mvmsta->lock); | |
949 | IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); | |
950 | return -EIO; | |
951 | } | |
952 | ||
953 | /* the new tx queue is still connected to the same mac80211 queue */ | |
954 | mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_mac80211_ac[tid]]; | |
955 | ||
956 | tid_data = &mvmsta->tid_data[tid]; | |
957 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); | |
958 | tid_data->txq_id = txq_id; | |
959 | *ssn = tid_data->ssn; | |
960 | ||
961 | IWL_DEBUG_TX_QUEUES(mvm, | |
962 | "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", | |
963 | mvmsta->sta_id, tid, txq_id, tid_data->ssn, | |
964 | tid_data->next_reclaimed); | |
965 | ||
966 | if (tid_data->ssn == tid_data->next_reclaimed) { | |
967 | tid_data->state = IWL_AGG_STARTING; | |
968 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
969 | } else { | |
970 | tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
971 | } | |
972 | ||
973 | spin_unlock_bh(&mvmsta->lock); | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
979 | struct ieee80211_sta *sta, u16 tid, u8 buf_size) | |
980 | { | |
981 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
982 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
983 | unsigned int wdg_timeout = | |
984 | iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false); | |
985 | int queue, fifo, ret; | |
986 | u16 ssn; | |
987 | ||
988 | BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) | |
989 | != IWL_MAX_TID_COUNT); | |
990 | ||
991 | buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); | |
992 | ||
993 | spin_lock_bh(&mvmsta->lock); | |
994 | ssn = tid_data->ssn; | |
995 | queue = tid_data->txq_id; | |
996 | tid_data->state = IWL_AGG_ON; | |
997 | mvmsta->agg_tids |= BIT(tid); | |
998 | tid_data->ssn = 0xffff; | |
999 | spin_unlock_bh(&mvmsta->lock); | |
1000 | ||
1001 | fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; | |
1002 | ||
1003 | iwl_mvm_enable_agg_txq(mvm, queue, fifo, mvmsta->sta_id, tid, | |
1004 | buf_size, ssn, wdg_timeout); | |
1005 | ||
1006 | ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); | |
1007 | if (ret) | |
1008 | return -EIO; | |
1009 | ||
1010 | /* | |
1011 | * Even though in theory the peer could have different | |
1012 | * aggregation reorder buffer sizes for different sessions, | |
1013 | * our ucode doesn't allow for that and has a global limit | |
1014 | * for each station. Therefore, use the minimum of all the | |
1015 | * aggregation sessions and our default value. | |
1016 | */ | |
1017 | mvmsta->max_agg_bufsize = | |
1018 | min(mvmsta->max_agg_bufsize, buf_size); | |
1019 | mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
1020 | ||
1021 | IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", | |
1022 | sta->addr, tid); | |
1023 | ||
1024 | return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); | |
1025 | } | |
1026 | ||
1027 | int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
1028 | struct ieee80211_sta *sta, u16 tid) | |
1029 | { | |
1030 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1031 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
1032 | u16 txq_id; | |
1033 | int err; | |
1034 | ||
1035 | ||
1036 | /* | |
1037 | * If mac80211 is cleaning its state, then say that we finished since | |
1038 | * our state has been cleared anyway. | |
1039 | */ | |
1040 | if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
1041 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | spin_lock_bh(&mvmsta->lock); | |
1046 | ||
1047 | txq_id = tid_data->txq_id; | |
1048 | ||
1049 | IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", | |
1050 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
1051 | ||
1052 | mvmsta->agg_tids &= ~BIT(tid); | |
1053 | ||
1054 | switch (tid_data->state) { | |
1055 | case IWL_AGG_ON: | |
1056 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); | |
1057 | ||
1058 | IWL_DEBUG_TX_QUEUES(mvm, | |
1059 | "ssn = %d, next_recl = %d\n", | |
1060 | tid_data->ssn, tid_data->next_reclaimed); | |
1061 | ||
1062 | /* There are still packets for this RA / TID in the HW */ | |
1063 | if (tid_data->ssn != tid_data->next_reclaimed) { | |
1064 | tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; | |
1065 | err = 0; | |
1066 | break; | |
1067 | } | |
1068 | ||
1069 | tid_data->ssn = 0xffff; | |
1070 | tid_data->state = IWL_AGG_OFF; | |
1071 | mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; | |
1072 | spin_unlock_bh(&mvmsta->lock); | |
1073 | ||
1074 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1075 | ||
1076 | iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); | |
1077 | ||
1078 | iwl_mvm_disable_txq(mvm, txq_id, 0); | |
1079 | return 0; | |
1080 | case IWL_AGG_STARTING: | |
1081 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
1082 | /* | |
1083 | * The agg session has been stopped before it was set up. This | |
1084 | * can happen when the AddBA timer times out for example. | |
1085 | */ | |
1086 | ||
1087 | /* No barriers since we are under mutex */ | |
1088 | lockdep_assert_held(&mvm->mutex); | |
1089 | mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; | |
1090 | ||
1091 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1092 | tid_data->state = IWL_AGG_OFF; | |
1093 | err = 0; | |
1094 | break; | |
1095 | default: | |
1096 | IWL_ERR(mvm, | |
1097 | "Stopping AGG while state not ON or starting for %d on %d (%d)\n", | |
1098 | mvmsta->sta_id, tid, tid_data->state); | |
1099 | IWL_ERR(mvm, | |
1100 | "\ttid_data->txq_id = %d\n", tid_data->txq_id); | |
1101 | err = -EINVAL; | |
1102 | } | |
1103 | ||
1104 | spin_unlock_bh(&mvmsta->lock); | |
1105 | ||
1106 | return err; | |
1107 | } | |
1108 | ||
1109 | int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
1110 | struct ieee80211_sta *sta, u16 tid) | |
1111 | { | |
1112 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1113 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
1114 | u16 txq_id; | |
1115 | enum iwl_mvm_agg_state old_state; | |
1116 | ||
1117 | /* | |
1118 | * First set the agg state to OFF to avoid calling | |
1119 | * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. | |
1120 | */ | |
1121 | spin_lock_bh(&mvmsta->lock); | |
1122 | txq_id = tid_data->txq_id; | |
1123 | IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", | |
1124 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
1125 | old_state = tid_data->state; | |
1126 | tid_data->state = IWL_AGG_OFF; | |
1127 | mvmsta->agg_tids &= ~BIT(tid); | |
1128 | spin_unlock_bh(&mvmsta->lock); | |
1129 | ||
1130 | if (old_state >= IWL_AGG_ON) { | |
1131 | iwl_mvm_drain_sta(mvm, mvmsta, true); | |
1132 | if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) | |
1133 | IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); | |
1134 | iwl_trans_wait_tx_queue_empty(mvm->trans, | |
1135 | mvmsta->tfd_queue_msk); | |
1136 | iwl_mvm_drain_sta(mvm, mvmsta, false); | |
1137 | ||
1138 | iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); | |
1139 | ||
1140 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, 0); | |
1141 | } | |
1142 | ||
1143 | mvm->queue_to_mac80211[tid_data->txq_id] = | |
1144 | IWL_INVALID_MAC80211_QUEUE; | |
1145 | ||
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) | |
1150 | { | |
1151 | int i; | |
1152 | ||
1153 | lockdep_assert_held(&mvm->mutex); | |
1154 | ||
1155 | i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM); | |
1156 | ||
1157 | if (i == STA_KEY_MAX_NUM) | |
1158 | return STA_KEY_IDX_INVALID; | |
1159 | ||
1160 | __set_bit(i, mvm->fw_key_table); | |
1161 | ||
1162 | return i; | |
1163 | } | |
1164 | ||
1165 | static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif, | |
1166 | struct ieee80211_sta *sta) | |
1167 | { | |
1168 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1169 | ||
1170 | if (sta) { | |
1171 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1172 | ||
1173 | return mvm_sta->sta_id; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * The device expects GTKs for station interfaces to be | |
1178 | * installed as GTKs for the AP station. If we have no | |
1179 | * station ID, then use AP's station ID. | |
1180 | */ | |
1181 | if (vif->type == NL80211_IFTYPE_STATION && | |
1182 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) | |
1183 | return mvmvif->ap_sta_id; | |
1184 | ||
1185 | return IWL_MVM_STATION_COUNT; | |
1186 | } | |
1187 | ||
1188 | static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, | |
1189 | struct iwl_mvm_sta *mvm_sta, | |
1190 | struct ieee80211_key_conf *keyconf, bool mcast, | |
1191 | u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags) | |
1192 | { | |
1193 | struct iwl_mvm_add_sta_key_cmd cmd = {}; | |
1194 | __le16 key_flags; | |
1195 | int ret; | |
1196 | u32 status; | |
1197 | u16 keyidx; | |
1198 | int i; | |
1199 | u8 sta_id = mvm_sta->sta_id; | |
1200 | ||
1201 | keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
1202 | STA_KEY_FLG_KEYID_MSK; | |
1203 | key_flags = cpu_to_le16(keyidx); | |
1204 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); | |
1205 | ||
1206 | switch (keyconf->cipher) { | |
1207 | case WLAN_CIPHER_SUITE_TKIP: | |
1208 | key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); | |
1209 | cmd.tkip_rx_tsc_byte2 = tkip_iv32; | |
1210 | for (i = 0; i < 5; i++) | |
1211 | cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); | |
1212 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
1213 | break; | |
1214 | case WLAN_CIPHER_SUITE_CCMP: | |
1215 | key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); | |
1216 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
1217 | break; | |
1218 | case WLAN_CIPHER_SUITE_WEP104: | |
1219 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); | |
1220 | /* fall through */ | |
1221 | case WLAN_CIPHER_SUITE_WEP40: | |
1222 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); | |
1223 | memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); | |
1224 | break; | |
1225 | default: | |
1226 | key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); | |
1227 | memcpy(cmd.key, keyconf->key, keyconf->keylen); | |
1228 | } | |
1229 | ||
1230 | if (mcast) | |
1231 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
1232 | ||
1233 | cmd.key_offset = keyconf->hw_key_idx; | |
1234 | cmd.key_flags = key_flags; | |
1235 | cmd.sta_id = sta_id; | |
1236 | ||
1237 | status = ADD_STA_SUCCESS; | |
1238 | if (cmd_flags & CMD_ASYNC) | |
1239 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, | |
1240 | sizeof(cmd), &cmd); | |
1241 | else | |
1242 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), | |
1243 | &cmd, &status); | |
1244 | ||
1245 | switch (status) { | |
1246 | case ADD_STA_SUCCESS: | |
1247 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); | |
1248 | break; | |
1249 | default: | |
1250 | ret = -EIO; | |
1251 | IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); | |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | return ret; | |
1256 | } | |
1257 | ||
1258 | static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, | |
1259 | struct ieee80211_key_conf *keyconf, | |
1260 | u8 sta_id, bool remove_key) | |
1261 | { | |
1262 | struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; | |
1263 | ||
1264 | /* verify the key details match the required command's expectations */ | |
1265 | if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || | |
1266 | (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || | |
1267 | (keyconf->keyidx != 4 && keyconf->keyidx != 5))) | |
1268 | return -EINVAL; | |
1269 | ||
1270 | igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); | |
1271 | igtk_cmd.sta_id = cpu_to_le32(sta_id); | |
1272 | ||
1273 | if (remove_key) { | |
1274 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); | |
1275 | } else { | |
1276 | struct ieee80211_key_seq seq; | |
1277 | const u8 *pn; | |
1278 | ||
1279 | memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); | |
1280 | ieee80211_aes_cmac_calculate_k1_k2(keyconf, | |
1281 | igtk_cmd.K1, igtk_cmd.K2); | |
1282 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1283 | pn = seq.aes_cmac.pn; | |
1284 | igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | | |
1285 | ((u64) pn[4] << 8) | | |
1286 | ((u64) pn[3] << 16) | | |
1287 | ((u64) pn[2] << 24) | | |
1288 | ((u64) pn[1] << 32) | | |
1289 | ((u64) pn[0] << 40)); | |
1290 | } | |
1291 | ||
1292 | IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", | |
1293 | remove_key ? "removing" : "installing", | |
1294 | igtk_cmd.sta_id); | |
1295 | ||
1296 | return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, | |
1297 | sizeof(igtk_cmd), &igtk_cmd); | |
1298 | } | |
1299 | ||
1300 | ||
1301 | static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, | |
1302 | struct ieee80211_vif *vif, | |
1303 | struct ieee80211_sta *sta) | |
1304 | { | |
1305 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1306 | ||
1307 | if (sta) | |
1308 | return sta->addr; | |
1309 | ||
1310 | if (vif->type == NL80211_IFTYPE_STATION && | |
1311 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { | |
1312 | u8 sta_id = mvmvif->ap_sta_id; | |
1313 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1314 | lockdep_is_held(&mvm->mutex)); | |
1315 | return sta->addr; | |
1316 | } | |
1317 | ||
1318 | ||
1319 | return NULL; | |
1320 | } | |
1321 | ||
1322 | static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
1323 | struct ieee80211_vif *vif, | |
1324 | struct ieee80211_sta *sta, | |
1325 | struct ieee80211_key_conf *keyconf, | |
1326 | bool mcast) | |
1327 | { | |
1328 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1329 | int ret; | |
1330 | const u8 *addr; | |
1331 | struct ieee80211_key_seq seq; | |
1332 | u16 p1k[5]; | |
1333 | ||
1334 | switch (keyconf->cipher) { | |
1335 | case WLAN_CIPHER_SUITE_TKIP: | |
1336 | addr = iwl_mvm_get_mac_addr(mvm, vif, sta); | |
1337 | /* get phase 1 key from mac80211 */ | |
1338 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1339 | ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); | |
1340 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
1341 | seq.tkip.iv32, p1k, 0); | |
1342 | break; | |
1343 | case WLAN_CIPHER_SUITE_CCMP: | |
1344 | case WLAN_CIPHER_SUITE_WEP40: | |
1345 | case WLAN_CIPHER_SUITE_WEP104: | |
1346 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
1347 | 0, NULL, 0); | |
1348 | break; | |
1349 | default: | |
1350 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
1351 | 0, NULL, 0); | |
1352 | } | |
1353 | ||
1354 | return ret; | |
1355 | } | |
1356 | ||
1357 | static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, | |
1358 | struct ieee80211_key_conf *keyconf, | |
1359 | bool mcast) | |
1360 | { | |
1361 | struct iwl_mvm_add_sta_key_cmd cmd = {}; | |
1362 | __le16 key_flags; | |
1363 | int ret; | |
1364 | u32 status; | |
1365 | ||
1366 | key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
1367 | STA_KEY_FLG_KEYID_MSK); | |
1368 | key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); | |
1369 | key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); | |
1370 | ||
1371 | if (mcast) | |
1372 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
1373 | ||
1374 | cmd.key_flags = key_flags; | |
1375 | cmd.key_offset = keyconf->hw_key_idx; | |
1376 | cmd.sta_id = sta_id; | |
1377 | ||
1378 | status = ADD_STA_SUCCESS; | |
1379 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), | |
1380 | &cmd, &status); | |
1381 | ||
1382 | switch (status) { | |
1383 | case ADD_STA_SUCCESS: | |
1384 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); | |
1385 | break; | |
1386 | default: | |
1387 | ret = -EIO; | |
1388 | IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); | |
1389 | break; | |
1390 | } | |
1391 | ||
1392 | return ret; | |
1393 | } | |
1394 | ||
1395 | int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
1396 | struct ieee80211_vif *vif, | |
1397 | struct ieee80211_sta *sta, | |
1398 | struct ieee80211_key_conf *keyconf, | |
1399 | bool have_key_offset) | |
1400 | { | |
1401 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
1402 | u8 sta_id; | |
1403 | int ret; | |
1404 | ||
1405 | lockdep_assert_held(&mvm->mutex); | |
1406 | ||
1407 | /* Get the station id from the mvm local station table */ | |
1408 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
1409 | if (sta_id == IWL_MVM_STATION_COUNT) { | |
1410 | IWL_ERR(mvm, "Failed to find station id\n"); | |
1411 | return -EINVAL; | |
1412 | } | |
1413 | ||
1414 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { | |
1415 | ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); | |
1416 | goto end; | |
1417 | } | |
1418 | ||
1419 | /* | |
1420 | * It is possible that the 'sta' parameter is NULL, and thus | |
1421 | * there is a need to retrieve the sta from the local station table. | |
1422 | */ | |
1423 | if (!sta) { | |
1424 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1425 | lockdep_is_held(&mvm->mutex)); | |
1426 | if (IS_ERR_OR_NULL(sta)) { | |
1427 | IWL_ERR(mvm, "Invalid station id\n"); | |
1428 | return -EINVAL; | |
1429 | } | |
1430 | } | |
1431 | ||
1432 | if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) | |
1433 | return -EINVAL; | |
1434 | ||
1435 | if (!have_key_offset) { | |
1436 | /* | |
1437 | * The D3 firmware hardcodes the PTK offset to 0, so we have to | |
1438 | * configure it there. As a result, this workaround exists to | |
1439 | * let the caller set the key offset (hw_key_idx), see d3.c. | |
1440 | */ | |
1441 | keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm); | |
1442 | if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) | |
1443 | return -ENOSPC; | |
1444 | } | |
1445 | ||
1446 | ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, mcast); | |
1447 | if (ret) { | |
1448 | __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1449 | goto end; | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * For WEP, the same key is used for multicast and unicast. Upload it | |
1454 | * again, using the same key offset, and now pointing the other one | |
1455 | * to the same key slot (offset). | |
1456 | * If this fails, remove the original as well. | |
1457 | */ | |
1458 | if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || | |
1459 | keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { | |
1460 | ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, !mcast); | |
1461 | if (ret) { | |
1462 | __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1463 | __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | end: | |
1468 | IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", | |
1469 | keyconf->cipher, keyconf->keylen, keyconf->keyidx, | |
1470 | sta->addr, ret); | |
1471 | return ret; | |
1472 | } | |
1473 | ||
1474 | int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, | |
1475 | struct ieee80211_vif *vif, | |
1476 | struct ieee80211_sta *sta, | |
1477 | struct ieee80211_key_conf *keyconf) | |
1478 | { | |
1479 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
1480 | u8 sta_id; | |
1481 | int ret; | |
1482 | ||
1483 | lockdep_assert_held(&mvm->mutex); | |
1484 | ||
1485 | /* Get the station id from the mvm local station table */ | |
1486 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
1487 | ||
1488 | IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", | |
1489 | keyconf->keyidx, sta_id); | |
1490 | ||
1491 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) | |
1492 | return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); | |
1493 | ||
1494 | if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { | |
1495 | IWL_ERR(mvm, "offset %d not used in fw key table.\n", | |
1496 | keyconf->hw_key_idx); | |
1497 | return -ENOENT; | |
1498 | } | |
1499 | ||
1500 | if (sta_id == IWL_MVM_STATION_COUNT) { | |
1501 | IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * It is possible that the 'sta' parameter is NULL, and thus | |
1507 | * there is a need to retrieve the sta from the local station table, | |
1508 | * for example when a GTK is removed (where the sta_id will then be | |
1509 | * the AP ID, and no station was passed by mac80211.) | |
1510 | */ | |
1511 | if (!sta) { | |
1512 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1513 | lockdep_is_held(&mvm->mutex)); | |
1514 | if (!sta) { | |
1515 | IWL_ERR(mvm, "Invalid station id\n"); | |
1516 | return -EINVAL; | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) | |
1521 | return -EINVAL; | |
1522 | ||
1523 | ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); | |
1524 | if (ret) | |
1525 | return ret; | |
1526 | ||
1527 | /* delete WEP key twice to get rid of (now useless) offset */ | |
1528 | if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || | |
1529 | keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) | |
1530 | ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); | |
1531 | ||
1532 | return ret; | |
1533 | } | |
1534 | ||
1535 | void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, | |
1536 | struct ieee80211_vif *vif, | |
1537 | struct ieee80211_key_conf *keyconf, | |
1538 | struct ieee80211_sta *sta, u32 iv32, | |
1539 | u16 *phase1key) | |
1540 | { | |
1541 | struct iwl_mvm_sta *mvm_sta; | |
1542 | u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
1543 | bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); | |
1544 | ||
1545 | if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) | |
1546 | return; | |
1547 | ||
1548 | rcu_read_lock(); | |
1549 | ||
1550 | if (!sta) { | |
1551 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1552 | if (WARN_ON(IS_ERR_OR_NULL(sta))) { | |
1553 | rcu_read_unlock(); | |
1554 | return; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1559 | iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, | |
1560 | iv32, phase1key, CMD_ASYNC); | |
1561 | rcu_read_unlock(); | |
1562 | } | |
1563 | ||
1564 | void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, | |
1565 | struct ieee80211_sta *sta) | |
1566 | { | |
1567 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1568 | struct iwl_mvm_add_sta_cmd cmd = { | |
1569 | .add_modify = STA_MODE_MODIFY, | |
1570 | .sta_id = mvmsta->sta_id, | |
1571 | .station_flags_msk = cpu_to_le32(STA_FLG_PS), | |
1572 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
1573 | }; | |
1574 | int ret; | |
1575 | ||
1576 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1577 | if (ret) | |
1578 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1579 | } | |
1580 | ||
1581 | void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, | |
1582 | struct ieee80211_sta *sta, | |
1583 | enum ieee80211_frame_release_type reason, | |
1584 | u16 cnt, u16 tids, bool more_data, | |
1585 | bool agg) | |
1586 | { | |
1587 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
1588 | struct iwl_mvm_add_sta_cmd cmd = { | |
1589 | .add_modify = STA_MODE_MODIFY, | |
1590 | .sta_id = mvmsta->sta_id, | |
1591 | .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, | |
1592 | .sleep_tx_count = cpu_to_le16(cnt), | |
1593 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
1594 | }; | |
1595 | int tid, ret; | |
1596 | unsigned long _tids = tids; | |
1597 | ||
1598 | /* convert TIDs to ACs - we don't support TSPEC so that's OK | |
1599 | * Note that this field is reserved and unused by firmware not | |
1600 | * supporting GO uAPSD, so it's safe to always do this. | |
1601 | */ | |
1602 | for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) | |
1603 | cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); | |
1604 | ||
1605 | /* If we're releasing frames from aggregation queues then check if the | |
1606 | * all queues combined that we're releasing frames from have | |
1607 | * - more frames than the service period, in which case more_data | |
1608 | * needs to be set | |
1609 | * - fewer than 'cnt' frames, in which case we need to adjust the | |
1610 | * firmware command (but do that unconditionally) | |
1611 | */ | |
1612 | if (agg) { | |
1613 | int remaining = cnt; | |
1614 | ||
1615 | spin_lock_bh(&mvmsta->lock); | |
1616 | for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { | |
1617 | struct iwl_mvm_tid_data *tid_data; | |
1618 | u16 n_queued; | |
1619 | ||
1620 | tid_data = &mvmsta->tid_data[tid]; | |
1621 | if (WARN(tid_data->state != IWL_AGG_ON && | |
1622 | tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, | |
1623 | "TID %d state is %d\n", | |
1624 | tid, tid_data->state)) { | |
1625 | spin_unlock_bh(&mvmsta->lock); | |
1626 | ieee80211_sta_eosp(sta); | |
1627 | return; | |
1628 | } | |
1629 | ||
1630 | n_queued = iwl_mvm_tid_queued(tid_data); | |
1631 | if (n_queued > remaining) { | |
1632 | more_data = true; | |
1633 | remaining = 0; | |
1634 | break; | |
1635 | } | |
1636 | remaining -= n_queued; | |
1637 | } | |
1638 | spin_unlock_bh(&mvmsta->lock); | |
1639 | ||
1640 | cmd.sleep_tx_count = cpu_to_le16(cnt - remaining); | |
1641 | if (WARN_ON(cnt - remaining == 0)) { | |
1642 | ieee80211_sta_eosp(sta); | |
1643 | return; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* Note: this is ignored by firmware not supporting GO uAPSD */ | |
1648 | if (more_data) | |
1649 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); | |
1650 | ||
1651 | if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { | |
1652 | mvmsta->next_status_eosp = true; | |
1653 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); | |
1654 | } else { | |
1655 | cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); | |
1656 | } | |
1657 | ||
1658 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1659 | if (ret) | |
1660 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1661 | } | |
1662 | ||
1663 | int iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, | |
1664 | struct iwl_rx_cmd_buffer *rxb, | |
1665 | struct iwl_device_cmd *cmd) | |
1666 | { | |
1667 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1668 | struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; | |
1669 | struct ieee80211_sta *sta; | |
1670 | u32 sta_id = le32_to_cpu(notif->sta_id); | |
1671 | ||
1672 | if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) | |
1673 | return 0; | |
1674 | ||
1675 | rcu_read_lock(); | |
1676 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1677 | if (!IS_ERR_OR_NULL(sta)) | |
1678 | ieee80211_sta_eosp(sta); | |
1679 | rcu_read_unlock(); | |
1680 | ||
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, | |
1685 | struct iwl_mvm_sta *mvmsta, bool disable) | |
1686 | { | |
1687 | struct iwl_mvm_add_sta_cmd cmd = { | |
1688 | .add_modify = STA_MODE_MODIFY, | |
1689 | .sta_id = mvmsta->sta_id, | |
1690 | .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, | |
1691 | .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), | |
1692 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), | |
1693 | }; | |
1694 | int ret; | |
1695 | ||
1696 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1697 | if (ret) | |
1698 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1699 | } | |
1700 | ||
1701 | void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, | |
1702 | struct ieee80211_sta *sta, | |
1703 | bool disable) | |
1704 | { | |
1705 | struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1706 | ||
1707 | spin_lock_bh(&mvm_sta->lock); | |
1708 | ||
1709 | if (mvm_sta->disable_tx == disable) { | |
1710 | spin_unlock_bh(&mvm_sta->lock); | |
1711 | return; | |
1712 | } | |
1713 | ||
1714 | mvm_sta->disable_tx = disable; | |
1715 | ||
1716 | /* | |
1717 | * Tell mac80211 to start/stop queuing tx for this station, | |
1718 | * but don't stop queuing if there are still pending frames | |
1719 | * for this station. | |
1720 | */ | |
1721 | if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) | |
1722 | ieee80211_sta_block_awake(mvm->hw, sta, disable); | |
1723 | ||
1724 | iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); | |
1725 | ||
1726 | spin_unlock_bh(&mvm_sta->lock); | |
1727 | } | |
1728 | ||
1729 | void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, | |
1730 | struct iwl_mvm_vif *mvmvif, | |
1731 | bool disable) | |
1732 | { | |
1733 | struct ieee80211_sta *sta; | |
1734 | struct iwl_mvm_sta *mvm_sta; | |
1735 | int i; | |
1736 | ||
1737 | lockdep_assert_held(&mvm->mutex); | |
1738 | ||
1739 | /* Block/unblock all the stations of the given mvmvif */ | |
1740 | for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { | |
1741 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], | |
1742 | lockdep_is_held(&mvm->mutex)); | |
1743 | if (IS_ERR_OR_NULL(sta)) | |
1744 | continue; | |
1745 | ||
1746 | mvm_sta = iwl_mvm_sta_from_mac80211(sta); | |
1747 | if (mvm_sta->mac_id_n_color != | |
1748 | FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) | |
1749 | continue; | |
1750 | ||
1751 | iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) | |
1756 | { | |
1757 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
1758 | struct iwl_mvm_sta *mvmsta; | |
1759 | ||
1760 | rcu_read_lock(); | |
1761 | ||
1762 | mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); | |
1763 | ||
1764 | if (!WARN_ON(!mvmsta)) | |
1765 | iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); | |
1766 | ||
1767 | rcu_read_unlock(); | |
1768 | } |