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8ca151b5 JB |
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 - 2013 Intel Corporation. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 25 | * in the file called COPYING. |
8ca151b5 JB |
26 | * |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #include <net/mac80211.h> | |
64 | ||
65 | #include "mvm.h" | |
66 | #include "sta.h" | |
9ee718aa | 67 | #include "rs.h" |
8ca151b5 JB |
68 | |
69 | static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm) | |
70 | { | |
71 | int sta_id; | |
72 | ||
73 | WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); | |
74 | ||
75 | lockdep_assert_held(&mvm->mutex); | |
76 | ||
77 | /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ | |
78 | for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) | |
79 | if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
80 | lockdep_is_held(&mvm->mutex))) | |
81 | return sta_id; | |
82 | return IWL_MVM_STATION_COUNT; | |
83 | } | |
84 | ||
7a453973 JB |
85 | /* send station add/update command to firmware */ |
86 | int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
87 | bool update) | |
8ca151b5 JB |
88 | { |
89 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
90 | struct iwl_mvm_add_sta_cmd add_sta_cmd; | |
91 | int ret; | |
92 | u32 status; | |
93 | u32 agg_size = 0, mpdu_dens = 0; | |
94 | ||
95 | memset(&add_sta_cmd, 0, sizeof(add_sta_cmd)); | |
96 | ||
97 | add_sta_cmd.sta_id = mvm_sta->sta_id; | |
98 | add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
7a453973 JB |
99 | if (!update) { |
100 | add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
101 | memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); | |
102 | } | |
103 | add_sta_cmd.add_modify = update ? 1 : 0; | |
8ca151b5 | 104 | |
5bc5aaad JB |
105 | add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK | |
106 | STA_FLG_MIMO_EN_MSK); | |
107 | ||
108 | switch (sta->bandwidth) { | |
109 | case IEEE80211_STA_RX_BW_160: | |
110 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); | |
111 | /* fall through */ | |
112 | case IEEE80211_STA_RX_BW_80: | |
113 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); | |
114 | /* fall through */ | |
115 | case IEEE80211_STA_RX_BW_40: | |
116 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); | |
117 | /* fall through */ | |
118 | case IEEE80211_STA_RX_BW_20: | |
119 | if (sta->ht_cap.ht_supported) | |
120 | add_sta_cmd.station_flags |= | |
121 | cpu_to_le32(STA_FLG_FAT_EN_20MHZ); | |
122 | break; | |
123 | } | |
124 | ||
125 | switch (sta->rx_nss) { | |
126 | case 1: | |
127 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
128 | break; | |
129 | case 2: | |
130 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); | |
131 | break; | |
132 | case 3 ... 8: | |
133 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); | |
134 | break; | |
135 | } | |
136 | ||
137 | switch (sta->smps_mode) { | |
138 | case IEEE80211_SMPS_AUTOMATIC: | |
139 | case IEEE80211_SMPS_NUM_MODES: | |
140 | WARN_ON(1); | |
141 | break; | |
142 | case IEEE80211_SMPS_STATIC: | |
143 | /* override NSS */ | |
144 | add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); | |
145 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); | |
146 | break; | |
147 | case IEEE80211_SMPS_DYNAMIC: | |
148 | add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); | |
149 | break; | |
150 | case IEEE80211_SMPS_OFF: | |
151 | /* nothing */ | |
152 | break; | |
153 | } | |
8ca151b5 JB |
154 | |
155 | if (sta->ht_cap.ht_supported) { | |
156 | add_sta_cmd.station_flags_msk |= | |
157 | cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | | |
158 | STA_FLG_AGG_MPDU_DENS_MSK); | |
159 | ||
160 | mpdu_dens = sta->ht_cap.ampdu_density; | |
161 | } | |
162 | ||
163 | if (sta->vht_cap.vht_supported) { | |
164 | agg_size = sta->vht_cap.cap & | |
165 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; | |
166 | agg_size >>= | |
167 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; | |
168 | } else if (sta->ht_cap.ht_supported) { | |
169 | agg_size = sta->ht_cap.ampdu_factor; | |
170 | } | |
171 | ||
172 | add_sta_cmd.station_flags |= | |
173 | cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); | |
174 | add_sta_cmd.station_flags |= | |
175 | cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); | |
176 | ||
177 | status = ADD_STA_SUCCESS; | |
178 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd), | |
179 | &add_sta_cmd, &status); | |
180 | if (ret) | |
181 | return ret; | |
182 | ||
183 | switch (status) { | |
184 | case ADD_STA_SUCCESS: | |
185 | IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); | |
186 | break; | |
187 | default: | |
188 | ret = -EIO; | |
189 | IWL_ERR(mvm, "ADD_STA failed\n"); | |
190 | break; | |
191 | } | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
196 | int iwl_mvm_add_sta(struct iwl_mvm *mvm, | |
197 | struct ieee80211_vif *vif, | |
198 | struct ieee80211_sta *sta) | |
199 | { | |
200 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
201 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
202 | int i, ret, sta_id; | |
203 | ||
204 | lockdep_assert_held(&mvm->mutex); | |
205 | ||
206 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) | |
207 | sta_id = iwl_mvm_find_free_sta_id(mvm); | |
208 | else | |
209 | sta_id = mvm_sta->sta_id; | |
210 | ||
211 | if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) | |
212 | return -ENOSPC; | |
213 | ||
214 | spin_lock_init(&mvm_sta->lock); | |
215 | ||
216 | mvm_sta->sta_id = sta_id; | |
217 | mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, | |
218 | mvmvif->color); | |
219 | mvm_sta->vif = vif; | |
220 | mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; | |
9ee718aa EL |
221 | mvm_sta->tx_protection = 0; |
222 | mvm_sta->tt_tx_protection = false; | |
8ca151b5 JB |
223 | |
224 | /* HW restart, don't assume the memory has been zeroed */ | |
e3d4bc8c | 225 | atomic_set(&mvm->pending_frames[sta_id], 0); |
8ca151b5 JB |
226 | mvm_sta->tid_disable_agg = 0; |
227 | mvm_sta->tfd_queue_msk = 0; | |
228 | for (i = 0; i < IEEE80211_NUM_ACS; i++) | |
229 | if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) | |
230 | mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); | |
231 | ||
232 | if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE) | |
233 | mvm_sta->tfd_queue_msk |= BIT(vif->cab_queue); | |
234 | ||
235 | /* for HW restart - need to reset the seq_number etc... */ | |
236 | memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data)); | |
237 | ||
7a453973 | 238 | ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); |
8ca151b5 JB |
239 | if (ret) |
240 | return ret; | |
241 | ||
242 | /* The first station added is the AP, the others are TDLS STAs */ | |
243 | if (vif->type == NL80211_IFTYPE_STATION && | |
244 | mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) | |
245 | mvmvif->ap_sta_id = sta_id; | |
246 | ||
247 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
7a453973 JB |
252 | int iwl_mvm_update_sta(struct iwl_mvm *mvm, |
253 | struct ieee80211_vif *vif, | |
254 | struct ieee80211_sta *sta) | |
255 | { | |
256 | return iwl_mvm_sta_send_to_fw(mvm, sta, true); | |
257 | } | |
258 | ||
8ca151b5 JB |
259 | int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
260 | bool drain) | |
261 | { | |
262 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
263 | int ret; | |
264 | u32 status; | |
265 | ||
266 | lockdep_assert_held(&mvm->mutex); | |
267 | ||
268 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
269 | cmd.sta_id = mvmsta->sta_id; | |
270 | cmd.add_modify = STA_MODE_MODIFY; | |
271 | cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; | |
272 | cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); | |
273 | ||
274 | status = ADD_STA_SUCCESS; | |
275 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
276 | &cmd, &status); | |
277 | if (ret) | |
278 | return ret; | |
279 | ||
280 | switch (status) { | |
281 | case ADD_STA_SUCCESS: | |
282 | IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", | |
283 | mvmsta->sta_id); | |
284 | break; | |
285 | default: | |
286 | ret = -EIO; | |
287 | IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", | |
288 | mvmsta->sta_id); | |
289 | break; | |
290 | } | |
291 | ||
292 | return ret; | |
293 | } | |
294 | ||
295 | /* | |
296 | * Remove a station from the FW table. Before sending the command to remove | |
297 | * the station validate that the station is indeed known to the driver (sanity | |
298 | * only). | |
299 | */ | |
300 | static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) | |
301 | { | |
302 | struct ieee80211_sta *sta; | |
303 | struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { | |
304 | .sta_id = sta_id, | |
305 | }; | |
306 | int ret; | |
307 | ||
308 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
309 | lockdep_is_held(&mvm->mutex)); | |
310 | ||
311 | /* Note: internal stations are marked as error values */ | |
312 | if (!sta) { | |
313 | IWL_ERR(mvm, "Invalid station id\n"); | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC, | |
318 | sizeof(rm_sta_cmd), &rm_sta_cmd); | |
319 | if (ret) { | |
320 | IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | void iwl_mvm_sta_drained_wk(struct work_struct *wk) | |
328 | { | |
329 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); | |
330 | u8 sta_id; | |
331 | ||
332 | /* | |
333 | * The mutex is needed because of the SYNC cmd, but not only: if the | |
334 | * work would run concurrently with iwl_mvm_rm_sta, it would run before | |
335 | * iwl_mvm_rm_sta sets the station as busy, and exit. Then | |
336 | * iwl_mvm_rm_sta would set the station as busy, and nobody will clean | |
337 | * that later. | |
338 | */ | |
339 | mutex_lock(&mvm->mutex); | |
340 | ||
341 | for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { | |
342 | int ret; | |
343 | struct ieee80211_sta *sta = | |
344 | rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
345 | lockdep_is_held(&mvm->mutex)); | |
346 | ||
347 | /* This station is in use */ | |
348 | if (!IS_ERR(sta)) | |
349 | continue; | |
350 | ||
351 | if (PTR_ERR(sta) == -EINVAL) { | |
352 | IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", | |
353 | sta_id); | |
354 | continue; | |
355 | } | |
356 | ||
357 | if (!sta) { | |
358 | IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", | |
359 | sta_id); | |
360 | continue; | |
361 | } | |
362 | ||
363 | WARN_ON(PTR_ERR(sta) != -EBUSY); | |
364 | /* This station was removed and we waited until it got drained, | |
365 | * we can now proceed and remove it. | |
366 | */ | |
367 | ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
368 | if (ret) { | |
369 | IWL_ERR(mvm, | |
370 | "Couldn't remove sta %d after it was drained\n", | |
371 | sta_id); | |
372 | continue; | |
373 | } | |
374 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); | |
375 | clear_bit(sta_id, mvm->sta_drained); | |
376 | } | |
377 | ||
378 | mutex_unlock(&mvm->mutex); | |
379 | } | |
380 | ||
381 | int iwl_mvm_rm_sta(struct iwl_mvm *mvm, | |
382 | struct ieee80211_vif *vif, | |
383 | struct ieee80211_sta *sta) | |
384 | { | |
385 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
386 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
387 | int ret; | |
388 | ||
389 | lockdep_assert_held(&mvm->mutex); | |
390 | ||
391 | if (vif->type == NL80211_IFTYPE_STATION && | |
392 | mvmvif->ap_sta_id == mvm_sta->sta_id) { | |
80d85655 EG |
393 | /* flush its queues here since we are freeing mvm_sta */ |
394 | ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true); | |
395 | ||
8ca151b5 JB |
396 | /* |
397 | * Put a non-NULL since the fw station isn't removed. | |
398 | * It will be removed after the MAC will be set as | |
399 | * unassoc. | |
400 | */ | |
401 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], | |
402 | ERR_PTR(-EINVAL)); | |
403 | ||
8ca151b5 JB |
404 | /* if we are associated - we can't remove the AP STA now */ |
405 | if (vif->bss_conf.assoc) | |
406 | return ret; | |
407 | ||
408 | /* unassoc - go ahead - remove the AP STA now */ | |
409 | mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; | |
410 | } | |
411 | ||
e3d4bc8c EG |
412 | /* |
413 | * Make sure that the tx response code sees the station as -EBUSY and | |
414 | * calls the drain worker. | |
415 | */ | |
416 | spin_lock_bh(&mvm_sta->lock); | |
8ca151b5 JB |
417 | /* |
418 | * There are frames pending on the AC queues for this station. | |
419 | * We need to wait until all the frames are drained... | |
420 | */ | |
e3d4bc8c | 421 | if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { |
8ca151b5 JB |
422 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], |
423 | ERR_PTR(-EBUSY)); | |
e3d4bc8c EG |
424 | spin_unlock_bh(&mvm_sta->lock); |
425 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
8ca151b5 | 426 | } else { |
e3d4bc8c | 427 | spin_unlock_bh(&mvm_sta->lock); |
8ca151b5 JB |
428 | ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); |
429 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); | |
430 | } | |
431 | ||
432 | return ret; | |
433 | } | |
434 | ||
435 | int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, | |
436 | struct ieee80211_vif *vif, | |
437 | u8 sta_id) | |
438 | { | |
439 | int ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
440 | ||
441 | lockdep_assert_held(&mvm->mutex); | |
442 | ||
443 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); | |
444 | return ret; | |
445 | } | |
446 | ||
447 | int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta, | |
448 | u32 qmask) | |
449 | { | |
450 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
451 | sta->sta_id = iwl_mvm_find_free_sta_id(mvm); | |
452 | if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) | |
453 | return -ENOSPC; | |
454 | } | |
455 | ||
456 | sta->tfd_queue_msk = qmask; | |
457 | ||
458 | /* put a non-NULL value so iterating over the stations won't stop */ | |
459 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) | |
464 | { | |
465 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL); | |
466 | memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); | |
467 | sta->sta_id = IWL_MVM_STATION_COUNT; | |
468 | } | |
469 | ||
470 | static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, | |
471 | struct iwl_mvm_int_sta *sta, | |
472 | const u8 *addr, | |
473 | u16 mac_id, u16 color) | |
474 | { | |
475 | struct iwl_mvm_add_sta_cmd cmd; | |
476 | int ret; | |
477 | u32 status; | |
478 | ||
479 | lockdep_assert_held(&mvm->mutex); | |
480 | ||
481 | memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd)); | |
482 | cmd.sta_id = sta->sta_id; | |
483 | cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, | |
484 | color)); | |
485 | ||
486 | cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); | |
487 | ||
488 | if (addr) | |
489 | memcpy(cmd.addr, addr, ETH_ALEN); | |
490 | ||
491 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
492 | &cmd, &status); | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | switch (status) { | |
497 | case ADD_STA_SUCCESS: | |
498 | IWL_DEBUG_INFO(mvm, "Internal station added.\n"); | |
499 | return 0; | |
500 | default: | |
501 | ret = -EIO; | |
502 | IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", | |
503 | status); | |
504 | break; | |
505 | } | |
506 | return ret; | |
507 | } | |
508 | ||
509 | int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) | |
510 | { | |
511 | int ret; | |
512 | ||
513 | lockdep_assert_held(&mvm->mutex); | |
514 | ||
515 | /* Add the aux station, but without any queues */ | |
516 | ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0); | |
517 | if (ret) | |
518 | return ret; | |
519 | ||
520 | ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, | |
521 | MAC_INDEX_AUX, 0); | |
522 | ||
523 | if (ret) | |
524 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
525 | return ret; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Send the add station command for the vif's broadcast station. | |
530 | * Assumes that the station was already allocated. | |
531 | * | |
532 | * @mvm: the mvm component | |
533 | * @vif: the interface to which the broadcast station is added | |
534 | * @bsta: the broadcast station to add. | |
535 | */ | |
536 | int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
537 | struct iwl_mvm_int_sta *bsta) | |
538 | { | |
539 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
540 | static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
541 | ||
542 | lockdep_assert_held(&mvm->mutex); | |
543 | ||
544 | if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) | |
545 | return -ENOSPC; | |
546 | ||
547 | return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
548 | mvmvif->id, mvmvif->color); | |
549 | } | |
550 | ||
551 | /* Send the FW a request to remove the station from it's internal data | |
552 | * structures, but DO NOT remove the entry from the local data structures. */ | |
553 | int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, | |
554 | struct iwl_mvm_int_sta *bsta) | |
555 | { | |
556 | int ret; | |
557 | ||
558 | lockdep_assert_held(&mvm->mutex); | |
559 | ||
560 | ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); | |
561 | if (ret) | |
562 | IWL_WARN(mvm, "Failed sending remove station\n"); | |
563 | return ret; | |
564 | } | |
565 | ||
566 | /* Allocate a new station entry for the broadcast station to the given vif, | |
567 | * and send it to the FW. | |
568 | * Note that each P2P mac should have its own broadcast station. | |
569 | * | |
570 | * @mvm: the mvm component | |
571 | * @vif: the interface to which the broadcast station is added | |
572 | * @bsta: the broadcast station to add. */ | |
573 | int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
574 | struct iwl_mvm_int_sta *bsta) | |
575 | { | |
576 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
577 | static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
578 | u32 qmask; | |
579 | int ret; | |
580 | ||
581 | lockdep_assert_held(&mvm->mutex); | |
582 | ||
583 | qmask = iwl_mvm_mac_get_queues_mask(mvm, vif); | |
584 | ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask); | |
585 | if (ret) | |
586 | return ret; | |
587 | ||
588 | ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
589 | mvmvif->id, mvmvif->color); | |
590 | ||
591 | if (ret) | |
592 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
593 | return ret; | |
594 | } | |
595 | ||
596 | /* | |
597 | * Send the FW a request to remove the station from it's internal data | |
598 | * structures, and in addition remove it from the local data structure. | |
599 | */ | |
600 | int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta) | |
601 | { | |
602 | int ret; | |
603 | ||
604 | lockdep_assert_held(&mvm->mutex); | |
605 | ||
606 | ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); | |
607 | if (ret) | |
608 | return ret; | |
609 | ||
610 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
611 | return ret; | |
612 | } | |
613 | ||
614 | int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
615 | int tid, u16 ssn, bool start) | |
616 | { | |
617 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
618 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
619 | int ret; | |
620 | u32 status; | |
621 | ||
622 | lockdep_assert_held(&mvm->mutex); | |
623 | ||
624 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
625 | cmd.sta_id = mvm_sta->sta_id; | |
626 | cmd.add_modify = STA_MODE_MODIFY; | |
627 | cmd.add_immediate_ba_tid = (u8) tid; | |
628 | cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
629 | cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : | |
630 | STA_MODIFY_REMOVE_BA_TID; | |
631 | ||
632 | status = ADD_STA_SUCCESS; | |
633 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
634 | &cmd, &status); | |
635 | if (ret) | |
636 | return ret; | |
637 | ||
638 | switch (status) { | |
639 | case ADD_STA_SUCCESS: | |
640 | IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", | |
641 | start ? "start" : "stopp"); | |
642 | break; | |
643 | case ADD_STA_IMMEDIATE_BA_FAILURE: | |
644 | IWL_WARN(mvm, "RX BA Session refused by fw\n"); | |
645 | ret = -ENOSPC; | |
646 | break; | |
647 | default: | |
648 | ret = -EIO; | |
649 | IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", | |
650 | start ? "start" : "stopp", status); | |
651 | break; | |
652 | } | |
653 | ||
654 | return ret; | |
655 | } | |
656 | ||
657 | static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
658 | int tid, u8 queue, bool start) | |
659 | { | |
660 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
661 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
662 | int ret; | |
663 | u32 status; | |
664 | ||
665 | lockdep_assert_held(&mvm->mutex); | |
666 | ||
667 | if (start) { | |
668 | mvm_sta->tfd_queue_msk |= BIT(queue); | |
669 | mvm_sta->tid_disable_agg &= ~BIT(tid); | |
670 | } else { | |
671 | mvm_sta->tfd_queue_msk &= ~BIT(queue); | |
672 | mvm_sta->tid_disable_agg |= BIT(tid); | |
673 | } | |
674 | ||
675 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
676 | cmd.sta_id = mvm_sta->sta_id; | |
677 | cmd.add_modify = STA_MODE_MODIFY; | |
678 | cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; | |
679 | cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
680 | cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); | |
681 | ||
682 | status = ADD_STA_SUCCESS; | |
683 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
684 | &cmd, &status); | |
685 | if (ret) | |
686 | return ret; | |
687 | ||
688 | switch (status) { | |
689 | case ADD_STA_SUCCESS: | |
690 | break; | |
691 | default: | |
692 | ret = -EIO; | |
693 | IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", | |
694 | start ? "start" : "stopp", status); | |
695 | break; | |
696 | } | |
697 | ||
698 | return ret; | |
699 | } | |
700 | ||
701 | static const u8 tid_to_ac[] = { | |
702 | IEEE80211_AC_BE, | |
703 | IEEE80211_AC_BK, | |
704 | IEEE80211_AC_BK, | |
705 | IEEE80211_AC_BE, | |
706 | IEEE80211_AC_VI, | |
707 | IEEE80211_AC_VI, | |
708 | IEEE80211_AC_VO, | |
709 | IEEE80211_AC_VO, | |
710 | }; | |
711 | ||
712 | int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
713 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
714 | { | |
715 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
716 | struct iwl_mvm_tid_data *tid_data; | |
717 | int txq_id; | |
718 | ||
719 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
720 | return -EINVAL; | |
721 | ||
722 | if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { | |
723 | IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", | |
724 | mvmsta->tid_data[tid].state); | |
725 | return -ENXIO; | |
726 | } | |
727 | ||
728 | lockdep_assert_held(&mvm->mutex); | |
729 | ||
730 | for (txq_id = IWL_MVM_FIRST_AGG_QUEUE; | |
731 | txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++) | |
732 | if (mvm->queue_to_mac80211[txq_id] == | |
733 | IWL_INVALID_MAC80211_QUEUE) | |
734 | break; | |
735 | ||
736 | if (txq_id > IWL_MVM_LAST_AGG_QUEUE) { | |
737 | IWL_ERR(mvm, "Failed to allocate agg queue\n"); | |
738 | return -EIO; | |
739 | } | |
740 | ||
741 | /* the new tx queue is still connected to the same mac80211 queue */ | |
742 | mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]]; | |
743 | ||
744 | spin_lock_bh(&mvmsta->lock); | |
745 | tid_data = &mvmsta->tid_data[tid]; | |
9a886586 | 746 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
8ca151b5 JB |
747 | tid_data->txq_id = txq_id; |
748 | *ssn = tid_data->ssn; | |
749 | ||
750 | IWL_DEBUG_TX_QUEUES(mvm, | |
751 | "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", | |
752 | mvmsta->sta_id, tid, txq_id, tid_data->ssn, | |
753 | tid_data->next_reclaimed); | |
754 | ||
755 | if (tid_data->ssn == tid_data->next_reclaimed) { | |
756 | tid_data->state = IWL_AGG_STARTING; | |
757 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
758 | } else { | |
759 | tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
760 | } | |
761 | ||
762 | spin_unlock_bh(&mvmsta->lock); | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
767 | int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
768 | struct ieee80211_sta *sta, u16 tid, u8 buf_size) | |
769 | { | |
770 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
771 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
772 | int queue, fifo, ret; | |
773 | u16 ssn; | |
774 | ||
775 | buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); | |
776 | ||
777 | spin_lock_bh(&mvmsta->lock); | |
778 | ssn = tid_data->ssn; | |
779 | queue = tid_data->txq_id; | |
780 | tid_data->state = IWL_AGG_ON; | |
781 | tid_data->ssn = 0xffff; | |
782 | spin_unlock_bh(&mvmsta->lock); | |
783 | ||
784 | fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]]; | |
785 | ||
786 | ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); | |
787 | if (ret) | |
788 | return -EIO; | |
789 | ||
790 | iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid, | |
791 | buf_size, ssn); | |
792 | ||
793 | /* | |
794 | * Even though in theory the peer could have different | |
795 | * aggregation reorder buffer sizes for different sessions, | |
796 | * our ucode doesn't allow for that and has a global limit | |
797 | * for each station. Therefore, use the minimum of all the | |
798 | * aggregation sessions and our default value. | |
799 | */ | |
800 | mvmsta->max_agg_bufsize = | |
801 | min(mvmsta->max_agg_bufsize, buf_size); | |
802 | mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
803 | ||
9ee718aa EL |
804 | IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", |
805 | sta->addr, tid); | |
806 | ||
8ca151b5 JB |
807 | if (mvm->cfg->ht_params->use_rts_for_aggregation) { |
808 | /* | |
809 | * switch to RTS/CTS if it is the prefer protection | |
810 | * method for HT traffic | |
9ee718aa | 811 | * this function also sends the LQ command |
8ca151b5 | 812 | */ |
9ee718aa EL |
813 | return iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq, |
814 | mvmsta, true); | |
8ca151b5 JB |
815 | /* |
816 | * TODO: remove the TLC_RTS flag when we tear down the last | |
817 | * AGG session (agg_tids_count in DVM) | |
818 | */ | |
819 | } | |
820 | ||
8ca151b5 JB |
821 | return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false); |
822 | } | |
823 | ||
824 | int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
825 | struct ieee80211_sta *sta, u16 tid) | |
826 | { | |
827 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
828 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
829 | u16 txq_id; | |
830 | int err; | |
831 | ||
f9aa8dd3 EG |
832 | |
833 | /* | |
834 | * If mac80211 is cleaning its state, then say that we finished since | |
835 | * our state has been cleared anyway. | |
836 | */ | |
837 | if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
838 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
839 | return 0; | |
840 | } | |
841 | ||
8ca151b5 JB |
842 | spin_lock_bh(&mvmsta->lock); |
843 | ||
844 | txq_id = tid_data->txq_id; | |
845 | ||
846 | IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", | |
847 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
848 | ||
849 | switch (tid_data->state) { | |
850 | case IWL_AGG_ON: | |
9a886586 | 851 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
8ca151b5 JB |
852 | |
853 | IWL_DEBUG_TX_QUEUES(mvm, | |
854 | "ssn = %d, next_recl = %d\n", | |
855 | tid_data->ssn, tid_data->next_reclaimed); | |
856 | ||
857 | /* There are still packets for this RA / TID in the HW */ | |
858 | if (tid_data->ssn != tid_data->next_reclaimed) { | |
859 | tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; | |
860 | err = 0; | |
861 | break; | |
862 | } | |
863 | ||
864 | tid_data->ssn = 0xffff; | |
865 | iwl_trans_txq_disable(mvm->trans, txq_id); | |
866 | /* fall through */ | |
867 | case IWL_AGG_STARTING: | |
868 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
869 | /* | |
870 | * The agg session has been stopped before it was set up. This | |
871 | * can happen when the AddBA timer times out for example. | |
872 | */ | |
873 | ||
874 | /* No barriers since we are under mutex */ | |
875 | lockdep_assert_held(&mvm->mutex); | |
876 | mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; | |
877 | ||
878 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
879 | tid_data->state = IWL_AGG_OFF; | |
880 | err = 0; | |
881 | break; | |
882 | default: | |
883 | IWL_ERR(mvm, | |
884 | "Stopping AGG while state not ON or starting for %d on %d (%d)\n", | |
885 | mvmsta->sta_id, tid, tid_data->state); | |
886 | IWL_ERR(mvm, | |
887 | "\ttid_data->txq_id = %d\n", tid_data->txq_id); | |
888 | err = -EINVAL; | |
889 | } | |
890 | ||
891 | spin_unlock_bh(&mvmsta->lock); | |
892 | ||
893 | return err; | |
894 | } | |
895 | ||
e3d9e7ce EG |
896 | int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
897 | struct ieee80211_sta *sta, u16 tid) | |
898 | { | |
899 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
900 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
901 | u16 txq_id; | |
902 | ||
903 | /* | |
904 | * First set the agg state to OFF to avoid calling | |
905 | * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. | |
906 | */ | |
907 | spin_lock_bh(&mvmsta->lock); | |
908 | txq_id = tid_data->txq_id; | |
909 | IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", | |
910 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
911 | tid_data->state = IWL_AGG_OFF; | |
912 | spin_unlock_bh(&mvmsta->lock); | |
913 | ||
914 | if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) | |
915 | IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); | |
916 | ||
917 | iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); | |
918 | mvm->queue_to_mac80211[tid_data->txq_id] = | |
919 | IWL_INVALID_MAC80211_QUEUE; | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
8ca151b5 JB |
924 | static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) |
925 | { | |
926 | int i; | |
927 | ||
928 | lockdep_assert_held(&mvm->mutex); | |
929 | ||
930 | i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM); | |
931 | ||
932 | if (i == STA_KEY_MAX_NUM) | |
933 | return STA_KEY_IDX_INVALID; | |
934 | ||
935 | __set_bit(i, mvm->fw_key_table); | |
936 | ||
937 | return i; | |
938 | } | |
939 | ||
940 | static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif, | |
941 | struct ieee80211_sta *sta) | |
942 | { | |
943 | struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; | |
944 | ||
945 | if (sta) { | |
946 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
947 | ||
948 | return mvm_sta->sta_id; | |
949 | } | |
950 | ||
951 | /* | |
952 | * The device expects GTKs for station interfaces to be | |
953 | * installed as GTKs for the AP station. If we have no | |
954 | * station ID, then use AP's station ID. | |
955 | */ | |
956 | if (vif->type == NL80211_IFTYPE_STATION && | |
957 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) | |
958 | return mvmvif->ap_sta_id; | |
959 | ||
881acd89 | 960 | return IWL_MVM_STATION_COUNT; |
8ca151b5 JB |
961 | } |
962 | ||
963 | static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, | |
964 | struct iwl_mvm_sta *mvm_sta, | |
965 | struct ieee80211_key_conf *keyconf, | |
966 | u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, | |
967 | u32 cmd_flags) | |
968 | { | |
969 | __le16 key_flags; | |
970 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
971 | int ret, status; | |
972 | u16 keyidx; | |
973 | int i; | |
974 | ||
975 | keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
976 | STA_KEY_FLG_KEYID_MSK; | |
977 | key_flags = cpu_to_le16(keyidx); | |
978 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); | |
979 | ||
980 | switch (keyconf->cipher) { | |
981 | case WLAN_CIPHER_SUITE_TKIP: | |
982 | key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); | |
983 | cmd.key.tkip_rx_tsc_byte2 = tkip_iv32; | |
984 | for (i = 0; i < 5; i++) | |
985 | cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); | |
986 | memcpy(cmd.key.key, keyconf->key, keyconf->keylen); | |
987 | break; | |
988 | case WLAN_CIPHER_SUITE_CCMP: | |
989 | key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); | |
990 | memcpy(cmd.key.key, keyconf->key, keyconf->keylen); | |
991 | break; | |
992 | default: | |
993 | WARN_ON(1); | |
994 | return -EINVAL; | |
995 | } | |
996 | ||
997 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
998 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
999 | ||
1000 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
1001 | cmd.key.key_offset = keyconf->hw_key_idx; | |
1002 | cmd.key.key_flags = key_flags; | |
1003 | cmd.add_modify = STA_MODE_MODIFY; | |
1004 | cmd.modify_mask = STA_MODIFY_KEY; | |
1005 | cmd.sta_id = sta_id; | |
1006 | ||
1007 | status = ADD_STA_SUCCESS; | |
1008 | if (cmd_flags == CMD_SYNC) | |
1009 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
1010 | &cmd, &status); | |
1011 | else | |
1012 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, | |
1013 | sizeof(cmd), &cmd); | |
1014 | ||
1015 | switch (status) { | |
1016 | case ADD_STA_SUCCESS: | |
1017 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); | |
1018 | break; | |
1019 | default: | |
1020 | ret = -EIO; | |
1021 | IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); | |
1022 | break; | |
1023 | } | |
1024 | ||
1025 | return ret; | |
1026 | } | |
1027 | ||
1028 | static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, | |
1029 | struct ieee80211_key_conf *keyconf, | |
1030 | u8 sta_id, bool remove_key) | |
1031 | { | |
1032 | struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; | |
1033 | ||
1034 | /* verify the key details match the required command's expectations */ | |
1035 | if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || | |
1036 | (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || | |
1037 | (keyconf->keyidx != 4 && keyconf->keyidx != 5))) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); | |
1041 | igtk_cmd.sta_id = cpu_to_le32(sta_id); | |
1042 | ||
1043 | if (remove_key) { | |
1044 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); | |
1045 | } else { | |
1046 | struct ieee80211_key_seq seq; | |
1047 | const u8 *pn; | |
1048 | ||
1049 | memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); | |
1050 | ieee80211_aes_cmac_calculate_k1_k2(keyconf, | |
1051 | igtk_cmd.K1, igtk_cmd.K2); | |
1052 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1053 | pn = seq.aes_cmac.pn; | |
1054 | igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | | |
1055 | ((u64) pn[4] << 8) | | |
1056 | ((u64) pn[3] << 16) | | |
1057 | ((u64) pn[2] << 24) | | |
1058 | ((u64) pn[1] << 32) | | |
1059 | ((u64) pn[0] << 40)); | |
1060 | } | |
1061 | ||
1062 | IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", | |
1063 | remove_key ? "removing" : "installing", | |
1064 | igtk_cmd.sta_id); | |
1065 | ||
1066 | return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC, | |
1067 | sizeof(igtk_cmd), &igtk_cmd); | |
1068 | } | |
1069 | ||
1070 | ||
1071 | static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, | |
1072 | struct ieee80211_vif *vif, | |
1073 | struct ieee80211_sta *sta) | |
1074 | { | |
1075 | struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; | |
1076 | ||
1077 | if (sta) | |
1078 | return sta->addr; | |
1079 | ||
1080 | if (vif->type == NL80211_IFTYPE_STATION && | |
1081 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { | |
1082 | u8 sta_id = mvmvif->ap_sta_id; | |
1083 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1084 | lockdep_is_held(&mvm->mutex)); | |
1085 | return sta->addr; | |
1086 | } | |
1087 | ||
1088 | ||
1089 | return NULL; | |
1090 | } | |
1091 | ||
1092 | int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
1093 | struct ieee80211_vif *vif, | |
1094 | struct ieee80211_sta *sta, | |
1095 | struct ieee80211_key_conf *keyconf, | |
1096 | bool have_key_offset) | |
1097 | { | |
1098 | struct iwl_mvm_sta *mvm_sta; | |
1099 | int ret; | |
1100 | u8 *addr, sta_id; | |
1101 | struct ieee80211_key_seq seq; | |
1102 | u16 p1k[5]; | |
1103 | ||
1104 | lockdep_assert_held(&mvm->mutex); | |
1105 | ||
1106 | /* Get the station id from the mvm local station table */ | |
1107 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
881acd89 | 1108 | if (sta_id == IWL_MVM_STATION_COUNT) { |
8ca151b5 JB |
1109 | IWL_ERR(mvm, "Failed to find station id\n"); |
1110 | return -EINVAL; | |
1111 | } | |
1112 | ||
1113 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { | |
1114 | ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); | |
1115 | goto end; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * It is possible that the 'sta' parameter is NULL, and thus | |
1120 | * there is a need to retrieve the sta from the local station table. | |
1121 | */ | |
1122 | if (!sta) { | |
1123 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1124 | lockdep_is_held(&mvm->mutex)); | |
1125 | if (IS_ERR_OR_NULL(sta)) { | |
1126 | IWL_ERR(mvm, "Invalid station id\n"); | |
1127 | return -EINVAL; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; | |
1132 | if (WARN_ON_ONCE(mvm_sta->vif != vif)) | |
1133 | return -EINVAL; | |
1134 | ||
1135 | if (!have_key_offset) { | |
1136 | /* | |
1137 | * The D3 firmware hardcodes the PTK offset to 0, so we have to | |
1138 | * configure it there. As a result, this workaround exists to | |
1139 | * let the caller set the key offset (hw_key_idx), see d3.c. | |
1140 | */ | |
1141 | keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm); | |
1142 | if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) | |
1143 | return -ENOSPC; | |
1144 | } | |
1145 | ||
1146 | switch (keyconf->cipher) { | |
1147 | case WLAN_CIPHER_SUITE_TKIP: | |
1148 | addr = iwl_mvm_get_mac_addr(mvm, vif, sta); | |
1149 | /* get phase 1 key from mac80211 */ | |
1150 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1151 | ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); | |
1152 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, | |
1153 | seq.tkip.iv32, p1k, CMD_SYNC); | |
1154 | break; | |
1155 | case WLAN_CIPHER_SUITE_CCMP: | |
1156 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, | |
1157 | 0, NULL, CMD_SYNC); | |
1158 | break; | |
1159 | default: | |
1160 | IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher); | |
1161 | ret = -EINVAL; | |
1162 | } | |
1163 | ||
1164 | if (ret) | |
1165 | __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1166 | ||
1167 | end: | |
1168 | IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", | |
1169 | keyconf->cipher, keyconf->keylen, keyconf->keyidx, | |
1170 | sta->addr, ret); | |
1171 | return ret; | |
1172 | } | |
1173 | ||
1174 | int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, | |
1175 | struct ieee80211_vif *vif, | |
1176 | struct ieee80211_sta *sta, | |
1177 | struct ieee80211_key_conf *keyconf) | |
1178 | { | |
1179 | struct iwl_mvm_sta *mvm_sta; | |
1180 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
1181 | __le16 key_flags; | |
1182 | int ret, status; | |
1183 | u8 sta_id; | |
1184 | ||
1185 | lockdep_assert_held(&mvm->mutex); | |
1186 | ||
1187 | /* Get the station id from the mvm local station table */ | |
1188 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
1189 | ||
1190 | IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", | |
1191 | keyconf->keyidx, sta_id); | |
1192 | ||
1193 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) | |
1194 | return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); | |
1195 | ||
1196 | ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1197 | if (!ret) { | |
1198 | IWL_ERR(mvm, "offset %d not used in fw key table.\n", | |
1199 | keyconf->hw_key_idx); | |
1200 | return -ENOENT; | |
1201 | } | |
1202 | ||
881acd89 | 1203 | if (sta_id == IWL_MVM_STATION_COUNT) { |
8ca151b5 JB |
1204 | IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * It is possible that the 'sta' parameter is NULL, and thus | |
1210 | * there is a need to retrieve the sta from the local station table, | |
1211 | * for example when a GTK is removed (where the sta_id will then be | |
1212 | * the AP ID, and no station was passed by mac80211.) | |
1213 | */ | |
1214 | if (!sta) { | |
1215 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1216 | lockdep_is_held(&mvm->mutex)); | |
1217 | if (!sta) { | |
1218 | IWL_ERR(mvm, "Invalid station id\n"); | |
1219 | return -EINVAL; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; | |
1224 | if (WARN_ON_ONCE(mvm_sta->vif != vif)) | |
1225 | return -EINVAL; | |
1226 | ||
8115efbd EG |
1227 | key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & |
1228 | STA_KEY_FLG_KEYID_MSK); | |
8ca151b5 JB |
1229 | key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); |
1230 | key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); | |
1231 | ||
1232 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1233 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
1234 | ||
1235 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
1236 | cmd.key.key_flags = key_flags; | |
1237 | cmd.key.key_offset = keyconf->hw_key_idx; | |
1238 | cmd.sta_id = sta_id; | |
1239 | ||
1240 | cmd.modify_mask = STA_MODIFY_KEY; | |
1241 | cmd.add_modify = STA_MODE_MODIFY; | |
1242 | ||
1243 | status = ADD_STA_SUCCESS; | |
1244 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
1245 | &cmd, &status); | |
1246 | ||
1247 | switch (status) { | |
1248 | case ADD_STA_SUCCESS: | |
1249 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); | |
1250 | break; | |
1251 | default: | |
1252 | ret = -EIO; | |
1253 | IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, | |
1261 | struct ieee80211_vif *vif, | |
1262 | struct ieee80211_key_conf *keyconf, | |
1263 | struct ieee80211_sta *sta, u32 iv32, | |
1264 | u16 *phase1key) | |
1265 | { | |
c3eb536a | 1266 | struct iwl_mvm_sta *mvm_sta; |
8ca151b5 JB |
1267 | u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); |
1268 | ||
881acd89 | 1269 | if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
1270 | return; |
1271 | ||
c3eb536a BL |
1272 | rcu_read_lock(); |
1273 | ||
1274 | if (!sta) { | |
1275 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1276 | if (WARN_ON(IS_ERR_OR_NULL(sta))) { | |
1277 | rcu_read_unlock(); | |
1278 | return; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | mvm_sta = (void *)sta->drv_priv; | |
8ca151b5 JB |
1283 | iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, |
1284 | iv32, phase1key, CMD_ASYNC); | |
c3eb536a | 1285 | rcu_read_unlock(); |
8ca151b5 JB |
1286 | } |
1287 | ||
9cc40712 JB |
1288 | void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, |
1289 | struct ieee80211_sta *sta) | |
8ca151b5 | 1290 | { |
9cc40712 | 1291 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; |
8ca151b5 JB |
1292 | struct iwl_mvm_add_sta_cmd cmd = { |
1293 | .add_modify = STA_MODE_MODIFY, | |
9cc40712 | 1294 | .sta_id = mvmsta->sta_id, |
8ca151b5 JB |
1295 | .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, |
1296 | .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE), | |
9cc40712 | 1297 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), |
8ca151b5 JB |
1298 | }; |
1299 | int ret; | |
1300 | ||
1301 | /* | |
1302 | * Same modify mask for sleep_tx_count and sleep_state_flags but this | |
1303 | * should be fine since if we set the STA as "awake", then | |
1304 | * sleep_tx_count is not relevant. | |
1305 | */ | |
1306 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1307 | if (ret) | |
1308 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1309 | } | |
1310 | ||
9cc40712 JB |
1311 | void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, |
1312 | struct ieee80211_sta *sta, | |
8ca151b5 JB |
1313 | enum ieee80211_frame_release_type reason, |
1314 | u16 cnt) | |
1315 | { | |
1316 | u16 sleep_state_flags = | |
1317 | (reason == IEEE80211_FRAME_RELEASE_UAPSD) ? | |
1318 | STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL; | |
9cc40712 | 1319 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; |
8ca151b5 JB |
1320 | struct iwl_mvm_add_sta_cmd cmd = { |
1321 | .add_modify = STA_MODE_MODIFY, | |
9cc40712 | 1322 | .sta_id = mvmsta->sta_id, |
8ca151b5 JB |
1323 | .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, |
1324 | .sleep_tx_count = cpu_to_le16(cnt), | |
9cc40712 | 1325 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), |
8ca151b5 JB |
1326 | /* |
1327 | * Same modify mask for sleep_tx_count and sleep_state_flags so | |
1328 | * we must set the sleep_state_flags too. | |
1329 | */ | |
1330 | .sleep_state_flags = cpu_to_le16(sleep_state_flags), | |
1331 | }; | |
1332 | int ret; | |
1333 | ||
1334 | /* TODO: somehow the fw doesn't seem to take PS_POLL into account */ | |
1335 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1336 | if (ret) | |
1337 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1338 | } |