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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 | ||
8ca151b5 JB |
232 | /* for HW restart - need to reset the seq_number etc... */ |
233 | memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data)); | |
234 | ||
7a453973 | 235 | ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); |
8ca151b5 JB |
236 | if (ret) |
237 | return ret; | |
238 | ||
239 | /* The first station added is the AP, the others are TDLS STAs */ | |
240 | if (vif->type == NL80211_IFTYPE_STATION && | |
241 | mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) | |
242 | mvmvif->ap_sta_id = sta_id; | |
243 | ||
244 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
7a453973 JB |
249 | int iwl_mvm_update_sta(struct iwl_mvm *mvm, |
250 | struct ieee80211_vif *vif, | |
251 | struct ieee80211_sta *sta) | |
252 | { | |
253 | return iwl_mvm_sta_send_to_fw(mvm, sta, true); | |
254 | } | |
255 | ||
8ca151b5 JB |
256 | int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
257 | bool drain) | |
258 | { | |
259 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
260 | int ret; | |
261 | u32 status; | |
262 | ||
263 | lockdep_assert_held(&mvm->mutex); | |
264 | ||
265 | cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); | |
266 | cmd.sta_id = mvmsta->sta_id; | |
267 | cmd.add_modify = STA_MODE_MODIFY; | |
268 | cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; | |
269 | cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); | |
270 | ||
271 | status = ADD_STA_SUCCESS; | |
272 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
273 | &cmd, &status); | |
274 | if (ret) | |
275 | return ret; | |
276 | ||
277 | switch (status) { | |
278 | case ADD_STA_SUCCESS: | |
279 | IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", | |
280 | mvmsta->sta_id); | |
281 | break; | |
282 | default: | |
283 | ret = -EIO; | |
284 | IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", | |
285 | mvmsta->sta_id); | |
286 | break; | |
287 | } | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Remove a station from the FW table. Before sending the command to remove | |
294 | * the station validate that the station is indeed known to the driver (sanity | |
295 | * only). | |
296 | */ | |
297 | static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) | |
298 | { | |
299 | struct ieee80211_sta *sta; | |
300 | struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { | |
301 | .sta_id = sta_id, | |
302 | }; | |
303 | int ret; | |
304 | ||
305 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
306 | lockdep_is_held(&mvm->mutex)); | |
307 | ||
308 | /* Note: internal stations are marked as error values */ | |
309 | if (!sta) { | |
310 | IWL_ERR(mvm, "Invalid station id\n"); | |
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC, | |
315 | sizeof(rm_sta_cmd), &rm_sta_cmd); | |
316 | if (ret) { | |
317 | IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); | |
318 | return ret; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | void iwl_mvm_sta_drained_wk(struct work_struct *wk) | |
325 | { | |
326 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); | |
327 | u8 sta_id; | |
328 | ||
329 | /* | |
330 | * The mutex is needed because of the SYNC cmd, but not only: if the | |
331 | * work would run concurrently with iwl_mvm_rm_sta, it would run before | |
332 | * iwl_mvm_rm_sta sets the station as busy, and exit. Then | |
333 | * iwl_mvm_rm_sta would set the station as busy, and nobody will clean | |
334 | * that later. | |
335 | */ | |
336 | mutex_lock(&mvm->mutex); | |
337 | ||
338 | for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { | |
339 | int ret; | |
340 | struct ieee80211_sta *sta = | |
341 | rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
342 | lockdep_is_held(&mvm->mutex)); | |
343 | ||
344 | /* This station is in use */ | |
345 | if (!IS_ERR(sta)) | |
346 | continue; | |
347 | ||
348 | if (PTR_ERR(sta) == -EINVAL) { | |
349 | IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", | |
350 | sta_id); | |
351 | continue; | |
352 | } | |
353 | ||
354 | if (!sta) { | |
355 | IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", | |
356 | sta_id); | |
357 | continue; | |
358 | } | |
359 | ||
360 | WARN_ON(PTR_ERR(sta) != -EBUSY); | |
361 | /* This station was removed and we waited until it got drained, | |
362 | * we can now proceed and remove it. | |
363 | */ | |
364 | ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
365 | if (ret) { | |
366 | IWL_ERR(mvm, | |
367 | "Couldn't remove sta %d after it was drained\n", | |
368 | sta_id); | |
369 | continue; | |
370 | } | |
371 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); | |
372 | clear_bit(sta_id, mvm->sta_drained); | |
373 | } | |
374 | ||
375 | mutex_unlock(&mvm->mutex); | |
376 | } | |
377 | ||
378 | int iwl_mvm_rm_sta(struct iwl_mvm *mvm, | |
379 | struct ieee80211_vif *vif, | |
380 | struct ieee80211_sta *sta) | |
381 | { | |
382 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
383 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
384 | int ret; | |
385 | ||
386 | lockdep_assert_held(&mvm->mutex); | |
387 | ||
388 | if (vif->type == NL80211_IFTYPE_STATION && | |
389 | mvmvif->ap_sta_id == mvm_sta->sta_id) { | |
80d85655 EG |
390 | /* flush its queues here since we are freeing mvm_sta */ |
391 | ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true); | |
392 | ||
8ca151b5 JB |
393 | /* |
394 | * Put a non-NULL since the fw station isn't removed. | |
395 | * It will be removed after the MAC will be set as | |
396 | * unassoc. | |
397 | */ | |
398 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], | |
399 | ERR_PTR(-EINVAL)); | |
400 | ||
8ca151b5 JB |
401 | /* if we are associated - we can't remove the AP STA now */ |
402 | if (vif->bss_conf.assoc) | |
403 | return ret; | |
404 | ||
405 | /* unassoc - go ahead - remove the AP STA now */ | |
406 | mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; | |
407 | } | |
408 | ||
e3d4bc8c EG |
409 | /* |
410 | * Make sure that the tx response code sees the station as -EBUSY and | |
411 | * calls the drain worker. | |
412 | */ | |
413 | spin_lock_bh(&mvm_sta->lock); | |
8ca151b5 JB |
414 | /* |
415 | * There are frames pending on the AC queues for this station. | |
416 | * We need to wait until all the frames are drained... | |
417 | */ | |
e3d4bc8c | 418 | if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { |
8ca151b5 JB |
419 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], |
420 | ERR_PTR(-EBUSY)); | |
e3d4bc8c EG |
421 | spin_unlock_bh(&mvm_sta->lock); |
422 | ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); | |
8ca151b5 | 423 | } else { |
e3d4bc8c | 424 | spin_unlock_bh(&mvm_sta->lock); |
8ca151b5 JB |
425 | ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); |
426 | rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); | |
427 | } | |
428 | ||
429 | return ret; | |
430 | } | |
431 | ||
432 | int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, | |
433 | struct ieee80211_vif *vif, | |
434 | u8 sta_id) | |
435 | { | |
436 | int ret = iwl_mvm_rm_sta_common(mvm, sta_id); | |
437 | ||
438 | lockdep_assert_held(&mvm->mutex); | |
439 | ||
440 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); | |
441 | return ret; | |
442 | } | |
443 | ||
444 | int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta, | |
445 | u32 qmask) | |
446 | { | |
447 | if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
448 | sta->sta_id = iwl_mvm_find_free_sta_id(mvm); | |
449 | if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) | |
450 | return -ENOSPC; | |
451 | } | |
452 | ||
453 | sta->tfd_queue_msk = qmask; | |
454 | ||
455 | /* put a non-NULL value so iterating over the stations won't stop */ | |
456 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); | |
457 | return 0; | |
458 | } | |
459 | ||
460 | void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) | |
461 | { | |
462 | rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL); | |
463 | memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); | |
464 | sta->sta_id = IWL_MVM_STATION_COUNT; | |
465 | } | |
466 | ||
467 | static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, | |
468 | struct iwl_mvm_int_sta *sta, | |
469 | const u8 *addr, | |
470 | u16 mac_id, u16 color) | |
471 | { | |
472 | struct iwl_mvm_add_sta_cmd cmd; | |
473 | int ret; | |
474 | u32 status; | |
475 | ||
476 | lockdep_assert_held(&mvm->mutex); | |
477 | ||
478 | memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd)); | |
479 | cmd.sta_id = sta->sta_id; | |
480 | cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, | |
481 | color)); | |
482 | ||
483 | cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); | |
484 | ||
485 | if (addr) | |
486 | memcpy(cmd.addr, addr, ETH_ALEN); | |
487 | ||
488 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
489 | &cmd, &status); | |
490 | if (ret) | |
491 | return ret; | |
492 | ||
493 | switch (status) { | |
494 | case ADD_STA_SUCCESS: | |
495 | IWL_DEBUG_INFO(mvm, "Internal station added.\n"); | |
496 | return 0; | |
497 | default: | |
498 | ret = -EIO; | |
499 | IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", | |
500 | status); | |
501 | break; | |
502 | } | |
503 | return ret; | |
504 | } | |
505 | ||
506 | int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) | |
507 | { | |
508 | int ret; | |
509 | ||
510 | lockdep_assert_held(&mvm->mutex); | |
511 | ||
512 | /* Add the aux station, but without any queues */ | |
513 | ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0); | |
514 | if (ret) | |
515 | return ret; | |
516 | ||
517 | ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, | |
518 | MAC_INDEX_AUX, 0); | |
519 | ||
520 | if (ret) | |
521 | iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); | |
522 | return ret; | |
523 | } | |
524 | ||
525 | /* | |
526 | * Send the add station command for the vif's broadcast station. | |
527 | * Assumes that the station was already allocated. | |
528 | * | |
529 | * @mvm: the mvm component | |
530 | * @vif: the interface to which the broadcast station is added | |
531 | * @bsta: the broadcast station to add. | |
532 | */ | |
533 | int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
534 | struct iwl_mvm_int_sta *bsta) | |
535 | { | |
536 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
537 | static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
538 | ||
539 | lockdep_assert_held(&mvm->mutex); | |
540 | ||
541 | if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) | |
542 | return -ENOSPC; | |
543 | ||
544 | return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
545 | mvmvif->id, mvmvif->color); | |
546 | } | |
547 | ||
548 | /* Send the FW a request to remove the station from it's internal data | |
549 | * structures, but DO NOT remove the entry from the local data structures. */ | |
550 | int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, | |
551 | struct iwl_mvm_int_sta *bsta) | |
552 | { | |
553 | int ret; | |
554 | ||
555 | lockdep_assert_held(&mvm->mutex); | |
556 | ||
557 | ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); | |
558 | if (ret) | |
559 | IWL_WARN(mvm, "Failed sending remove station\n"); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | /* Allocate a new station entry for the broadcast station to the given vif, | |
564 | * and send it to the FW. | |
565 | * Note that each P2P mac should have its own broadcast station. | |
566 | * | |
567 | * @mvm: the mvm component | |
568 | * @vif: the interface to which the broadcast station is added | |
569 | * @bsta: the broadcast station to add. */ | |
570 | int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
571 | struct iwl_mvm_int_sta *bsta) | |
572 | { | |
573 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
574 | static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; | |
575 | u32 qmask; | |
576 | int ret; | |
577 | ||
578 | lockdep_assert_held(&mvm->mutex); | |
579 | ||
580 | qmask = iwl_mvm_mac_get_queues_mask(mvm, vif); | |
581 | ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask); | |
582 | if (ret) | |
583 | return ret; | |
584 | ||
585 | ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, | |
586 | mvmvif->id, mvmvif->color); | |
587 | ||
588 | if (ret) | |
589 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
590 | return ret; | |
591 | } | |
592 | ||
593 | /* | |
594 | * Send the FW a request to remove the station from it's internal data | |
595 | * structures, and in addition remove it from the local data structure. | |
596 | */ | |
597 | int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta) | |
598 | { | |
599 | int ret; | |
600 | ||
601 | lockdep_assert_held(&mvm->mutex); | |
602 | ||
603 | ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); | |
604 | if (ret) | |
605 | return ret; | |
606 | ||
607 | iwl_mvm_dealloc_int_sta(mvm, bsta); | |
608 | return ret; | |
609 | } | |
610 | ||
113a0447 EG |
611 | #define IWL_MAX_RX_BA_SESSIONS 16 |
612 | ||
8ca151b5 JB |
613 | int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
614 | int tid, u16 ssn, bool start) | |
615 | { | |
616 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
617 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
618 | int ret; | |
619 | u32 status; | |
620 | ||
621 | lockdep_assert_held(&mvm->mutex); | |
622 | ||
113a0447 EG |
623 | if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { |
624 | IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); | |
625 | return -ENOSPC; | |
626 | } | |
627 | ||
8ca151b5 JB |
628 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); |
629 | cmd.sta_id = mvm_sta->sta_id; | |
630 | cmd.add_modify = STA_MODE_MODIFY; | |
93a42667 EG |
631 | if (start) { |
632 | cmd.add_immediate_ba_tid = (u8) tid; | |
633 | cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
634 | } else { | |
635 | cmd.remove_immediate_ba_tid = (u8) tid; | |
636 | } | |
8ca151b5 JB |
637 | cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : |
638 | STA_MODIFY_REMOVE_BA_TID; | |
639 | ||
640 | status = ADD_STA_SUCCESS; | |
641 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
642 | &cmd, &status); | |
643 | if (ret) | |
644 | return ret; | |
645 | ||
646 | switch (status) { | |
647 | case ADD_STA_SUCCESS: | |
648 | IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", | |
649 | start ? "start" : "stopp"); | |
650 | break; | |
651 | case ADD_STA_IMMEDIATE_BA_FAILURE: | |
652 | IWL_WARN(mvm, "RX BA Session refused by fw\n"); | |
653 | ret = -ENOSPC; | |
654 | break; | |
655 | default: | |
656 | ret = -EIO; | |
657 | IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", | |
658 | start ? "start" : "stopp", status); | |
659 | break; | |
660 | } | |
661 | ||
113a0447 EG |
662 | if (!ret) { |
663 | if (start) | |
664 | mvm->rx_ba_sessions++; | |
665 | else if (mvm->rx_ba_sessions > 0) | |
666 | /* check that restart flow didn't zero the counter */ | |
667 | mvm->rx_ba_sessions--; | |
668 | } | |
669 | ||
8ca151b5 JB |
670 | return ret; |
671 | } | |
672 | ||
673 | static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, | |
674 | int tid, u8 queue, bool start) | |
675 | { | |
676 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
677 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
678 | int ret; | |
679 | u32 status; | |
680 | ||
681 | lockdep_assert_held(&mvm->mutex); | |
682 | ||
683 | if (start) { | |
684 | mvm_sta->tfd_queue_msk |= BIT(queue); | |
685 | mvm_sta->tid_disable_agg &= ~BIT(tid); | |
686 | } else { | |
687 | mvm_sta->tfd_queue_msk &= ~BIT(queue); | |
688 | mvm_sta->tid_disable_agg |= BIT(tid); | |
689 | } | |
690 | ||
691 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
692 | cmd.sta_id = mvm_sta->sta_id; | |
693 | cmd.add_modify = STA_MODE_MODIFY; | |
694 | cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; | |
695 | cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); | |
696 | cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); | |
697 | ||
698 | status = ADD_STA_SUCCESS; | |
699 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
700 | &cmd, &status); | |
701 | if (ret) | |
702 | return ret; | |
703 | ||
704 | switch (status) { | |
705 | case ADD_STA_SUCCESS: | |
706 | break; | |
707 | default: | |
708 | ret = -EIO; | |
709 | IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", | |
710 | start ? "start" : "stopp", status); | |
711 | break; | |
712 | } | |
713 | ||
714 | return ret; | |
715 | } | |
716 | ||
717 | static const u8 tid_to_ac[] = { | |
718 | IEEE80211_AC_BE, | |
719 | IEEE80211_AC_BK, | |
720 | IEEE80211_AC_BK, | |
721 | IEEE80211_AC_BE, | |
722 | IEEE80211_AC_VI, | |
723 | IEEE80211_AC_VI, | |
724 | IEEE80211_AC_VO, | |
725 | IEEE80211_AC_VO, | |
726 | }; | |
727 | ||
728 | int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
729 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) | |
730 | { | |
731 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
732 | struct iwl_mvm_tid_data *tid_data; | |
733 | int txq_id; | |
734 | ||
735 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
736 | return -EINVAL; | |
737 | ||
738 | if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { | |
739 | IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", | |
740 | mvmsta->tid_data[tid].state); | |
741 | return -ENXIO; | |
742 | } | |
743 | ||
744 | lockdep_assert_held(&mvm->mutex); | |
745 | ||
746 | for (txq_id = IWL_MVM_FIRST_AGG_QUEUE; | |
747 | txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++) | |
748 | if (mvm->queue_to_mac80211[txq_id] == | |
749 | IWL_INVALID_MAC80211_QUEUE) | |
750 | break; | |
751 | ||
752 | if (txq_id > IWL_MVM_LAST_AGG_QUEUE) { | |
753 | IWL_ERR(mvm, "Failed to allocate agg queue\n"); | |
754 | return -EIO; | |
755 | } | |
756 | ||
757 | /* the new tx queue is still connected to the same mac80211 queue */ | |
758 | mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]]; | |
759 | ||
760 | spin_lock_bh(&mvmsta->lock); | |
761 | tid_data = &mvmsta->tid_data[tid]; | |
9a886586 | 762 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
8ca151b5 JB |
763 | tid_data->txq_id = txq_id; |
764 | *ssn = tid_data->ssn; | |
765 | ||
766 | IWL_DEBUG_TX_QUEUES(mvm, | |
767 | "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", | |
768 | mvmsta->sta_id, tid, txq_id, tid_data->ssn, | |
769 | tid_data->next_reclaimed); | |
770 | ||
771 | if (tid_data->ssn == tid_data->next_reclaimed) { | |
772 | tid_data->state = IWL_AGG_STARTING; | |
773 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
774 | } else { | |
775 | tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; | |
776 | } | |
777 | ||
778 | spin_unlock_bh(&mvmsta->lock); | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
784 | struct ieee80211_sta *sta, u16 tid, u8 buf_size) | |
785 | { | |
786 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
787 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
788 | int queue, fifo, ret; | |
789 | u16 ssn; | |
790 | ||
791 | buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); | |
792 | ||
793 | spin_lock_bh(&mvmsta->lock); | |
794 | ssn = tid_data->ssn; | |
795 | queue = tid_data->txq_id; | |
796 | tid_data->state = IWL_AGG_ON; | |
797 | tid_data->ssn = 0xffff; | |
798 | spin_unlock_bh(&mvmsta->lock); | |
799 | ||
800 | fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]]; | |
801 | ||
802 | ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); | |
803 | if (ret) | |
804 | return -EIO; | |
805 | ||
806 | iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid, | |
807 | buf_size, ssn); | |
808 | ||
809 | /* | |
810 | * Even though in theory the peer could have different | |
811 | * aggregation reorder buffer sizes for different sessions, | |
812 | * our ucode doesn't allow for that and has a global limit | |
813 | * for each station. Therefore, use the minimum of all the | |
814 | * aggregation sessions and our default value. | |
815 | */ | |
816 | mvmsta->max_agg_bufsize = | |
817 | min(mvmsta->max_agg_bufsize, buf_size); | |
818 | mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; | |
819 | ||
9ee718aa EL |
820 | IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", |
821 | sta->addr, tid); | |
822 | ||
8ca151b5 JB |
823 | if (mvm->cfg->ht_params->use_rts_for_aggregation) { |
824 | /* | |
825 | * switch to RTS/CTS if it is the prefer protection | |
826 | * method for HT traffic | |
9ee718aa | 827 | * this function also sends the LQ command |
8ca151b5 | 828 | */ |
9ee718aa EL |
829 | return iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq, |
830 | mvmsta, true); | |
8ca151b5 JB |
831 | /* |
832 | * TODO: remove the TLC_RTS flag when we tear down the last | |
833 | * AGG session (agg_tids_count in DVM) | |
834 | */ | |
835 | } | |
836 | ||
8ca151b5 JB |
837 | return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false); |
838 | } | |
839 | ||
840 | int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, | |
841 | struct ieee80211_sta *sta, u16 tid) | |
842 | { | |
843 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
844 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
845 | u16 txq_id; | |
846 | int err; | |
847 | ||
f9aa8dd3 EG |
848 | |
849 | /* | |
850 | * If mac80211 is cleaning its state, then say that we finished since | |
851 | * our state has been cleared anyway. | |
852 | */ | |
853 | if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { | |
854 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
855 | return 0; | |
856 | } | |
857 | ||
8ca151b5 JB |
858 | spin_lock_bh(&mvmsta->lock); |
859 | ||
860 | txq_id = tid_data->txq_id; | |
861 | ||
862 | IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", | |
863 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
864 | ||
865 | switch (tid_data->state) { | |
866 | case IWL_AGG_ON: | |
9a886586 | 867 | tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); |
8ca151b5 JB |
868 | |
869 | IWL_DEBUG_TX_QUEUES(mvm, | |
870 | "ssn = %d, next_recl = %d\n", | |
871 | tid_data->ssn, tid_data->next_reclaimed); | |
872 | ||
873 | /* There are still packets for this RA / TID in the HW */ | |
874 | if (tid_data->ssn != tid_data->next_reclaimed) { | |
875 | tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; | |
876 | err = 0; | |
877 | break; | |
878 | } | |
879 | ||
880 | tid_data->ssn = 0xffff; | |
881 | iwl_trans_txq_disable(mvm->trans, txq_id); | |
882 | /* fall through */ | |
883 | case IWL_AGG_STARTING: | |
884 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
885 | /* | |
886 | * The agg session has been stopped before it was set up. This | |
887 | * can happen when the AddBA timer times out for example. | |
888 | */ | |
889 | ||
890 | /* No barriers since we are under mutex */ | |
891 | lockdep_assert_held(&mvm->mutex); | |
892 | mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; | |
893 | ||
894 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
895 | tid_data->state = IWL_AGG_OFF; | |
896 | err = 0; | |
897 | break; | |
898 | default: | |
899 | IWL_ERR(mvm, | |
900 | "Stopping AGG while state not ON or starting for %d on %d (%d)\n", | |
901 | mvmsta->sta_id, tid, tid_data->state); | |
902 | IWL_ERR(mvm, | |
903 | "\ttid_data->txq_id = %d\n", tid_data->txq_id); | |
904 | err = -EINVAL; | |
905 | } | |
906 | ||
907 | spin_unlock_bh(&mvmsta->lock); | |
908 | ||
909 | return err; | |
910 | } | |
911 | ||
e3d9e7ce EG |
912 | int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
913 | struct ieee80211_sta *sta, u16 tid) | |
914 | { | |
915 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; | |
916 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; | |
917 | u16 txq_id; | |
b6658ff8 | 918 | enum iwl_mvm_agg_state old_state; |
e3d9e7ce EG |
919 | |
920 | /* | |
921 | * First set the agg state to OFF to avoid calling | |
922 | * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. | |
923 | */ | |
924 | spin_lock_bh(&mvmsta->lock); | |
925 | txq_id = tid_data->txq_id; | |
926 | IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", | |
927 | mvmsta->sta_id, tid, txq_id, tid_data->state); | |
b6658ff8 | 928 | old_state = tid_data->state; |
e3d9e7ce EG |
929 | tid_data->state = IWL_AGG_OFF; |
930 | spin_unlock_bh(&mvmsta->lock); | |
931 | ||
b6658ff8 JB |
932 | if (old_state >= IWL_AGG_ON) { |
933 | if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) | |
934 | IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); | |
935 | ||
936 | iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); | |
937 | } | |
e3d9e7ce | 938 | |
e3d9e7ce EG |
939 | mvm->queue_to_mac80211[tid_data->txq_id] = |
940 | IWL_INVALID_MAC80211_QUEUE; | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
8ca151b5 JB |
945 | static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) |
946 | { | |
947 | int i; | |
948 | ||
949 | lockdep_assert_held(&mvm->mutex); | |
950 | ||
951 | i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM); | |
952 | ||
953 | if (i == STA_KEY_MAX_NUM) | |
954 | return STA_KEY_IDX_INVALID; | |
955 | ||
956 | __set_bit(i, mvm->fw_key_table); | |
957 | ||
958 | return i; | |
959 | } | |
960 | ||
961 | static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif, | |
962 | struct ieee80211_sta *sta) | |
963 | { | |
964 | struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; | |
965 | ||
966 | if (sta) { | |
967 | struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; | |
968 | ||
969 | return mvm_sta->sta_id; | |
970 | } | |
971 | ||
972 | /* | |
973 | * The device expects GTKs for station interfaces to be | |
974 | * installed as GTKs for the AP station. If we have no | |
975 | * station ID, then use AP's station ID. | |
976 | */ | |
977 | if (vif->type == NL80211_IFTYPE_STATION && | |
978 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) | |
979 | return mvmvif->ap_sta_id; | |
980 | ||
881acd89 | 981 | return IWL_MVM_STATION_COUNT; |
8ca151b5 JB |
982 | } |
983 | ||
984 | static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, | |
985 | struct iwl_mvm_sta *mvm_sta, | |
986 | struct ieee80211_key_conf *keyconf, | |
987 | u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, | |
988 | u32 cmd_flags) | |
989 | { | |
990 | __le16 key_flags; | |
991 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
992 | int ret, status; | |
993 | u16 keyidx; | |
994 | int i; | |
995 | ||
996 | keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & | |
997 | STA_KEY_FLG_KEYID_MSK; | |
998 | key_flags = cpu_to_le16(keyidx); | |
999 | key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); | |
1000 | ||
1001 | switch (keyconf->cipher) { | |
1002 | case WLAN_CIPHER_SUITE_TKIP: | |
1003 | key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); | |
1004 | cmd.key.tkip_rx_tsc_byte2 = tkip_iv32; | |
1005 | for (i = 0; i < 5; i++) | |
1006 | cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); | |
1007 | memcpy(cmd.key.key, keyconf->key, keyconf->keylen); | |
1008 | break; | |
1009 | case WLAN_CIPHER_SUITE_CCMP: | |
1010 | key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); | |
1011 | memcpy(cmd.key.key, keyconf->key, keyconf->keylen); | |
1012 | break; | |
1013 | default: | |
1014 | WARN_ON(1); | |
1015 | return -EINVAL; | |
1016 | } | |
1017 | ||
1018 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1019 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
1020 | ||
1021 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
1022 | cmd.key.key_offset = keyconf->hw_key_idx; | |
1023 | cmd.key.key_flags = key_flags; | |
1024 | cmd.add_modify = STA_MODE_MODIFY; | |
1025 | cmd.modify_mask = STA_MODIFY_KEY; | |
1026 | cmd.sta_id = sta_id; | |
1027 | ||
1028 | status = ADD_STA_SUCCESS; | |
1029 | if (cmd_flags == CMD_SYNC) | |
1030 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
1031 | &cmd, &status); | |
1032 | else | |
1033 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, | |
1034 | sizeof(cmd), &cmd); | |
1035 | ||
1036 | switch (status) { | |
1037 | case ADD_STA_SUCCESS: | |
1038 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); | |
1039 | break; | |
1040 | default: | |
1041 | ret = -EIO; | |
1042 | IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); | |
1043 | break; | |
1044 | } | |
1045 | ||
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, | |
1050 | struct ieee80211_key_conf *keyconf, | |
1051 | u8 sta_id, bool remove_key) | |
1052 | { | |
1053 | struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; | |
1054 | ||
1055 | /* verify the key details match the required command's expectations */ | |
1056 | if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || | |
1057 | (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || | |
1058 | (keyconf->keyidx != 4 && keyconf->keyidx != 5))) | |
1059 | return -EINVAL; | |
1060 | ||
1061 | igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); | |
1062 | igtk_cmd.sta_id = cpu_to_le32(sta_id); | |
1063 | ||
1064 | if (remove_key) { | |
1065 | igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); | |
1066 | } else { | |
1067 | struct ieee80211_key_seq seq; | |
1068 | const u8 *pn; | |
1069 | ||
1070 | memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); | |
1071 | ieee80211_aes_cmac_calculate_k1_k2(keyconf, | |
1072 | igtk_cmd.K1, igtk_cmd.K2); | |
1073 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1074 | pn = seq.aes_cmac.pn; | |
1075 | igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | | |
1076 | ((u64) pn[4] << 8) | | |
1077 | ((u64) pn[3] << 16) | | |
1078 | ((u64) pn[2] << 24) | | |
1079 | ((u64) pn[1] << 32) | | |
1080 | ((u64) pn[0] << 40)); | |
1081 | } | |
1082 | ||
1083 | IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", | |
1084 | remove_key ? "removing" : "installing", | |
1085 | igtk_cmd.sta_id); | |
1086 | ||
1087 | return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC, | |
1088 | sizeof(igtk_cmd), &igtk_cmd); | |
1089 | } | |
1090 | ||
1091 | ||
1092 | static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, | |
1093 | struct ieee80211_vif *vif, | |
1094 | struct ieee80211_sta *sta) | |
1095 | { | |
1096 | struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv; | |
1097 | ||
1098 | if (sta) | |
1099 | return sta->addr; | |
1100 | ||
1101 | if (vif->type == NL80211_IFTYPE_STATION && | |
1102 | mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { | |
1103 | u8 sta_id = mvmvif->ap_sta_id; | |
1104 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1105 | lockdep_is_held(&mvm->mutex)); | |
1106 | return sta->addr; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | return NULL; | |
1111 | } | |
1112 | ||
1113 | int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, | |
1114 | struct ieee80211_vif *vif, | |
1115 | struct ieee80211_sta *sta, | |
1116 | struct ieee80211_key_conf *keyconf, | |
1117 | bool have_key_offset) | |
1118 | { | |
1119 | struct iwl_mvm_sta *mvm_sta; | |
1120 | int ret; | |
1121 | u8 *addr, sta_id; | |
1122 | struct ieee80211_key_seq seq; | |
1123 | u16 p1k[5]; | |
1124 | ||
1125 | lockdep_assert_held(&mvm->mutex); | |
1126 | ||
1127 | /* Get the station id from the mvm local station table */ | |
1128 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
881acd89 | 1129 | if (sta_id == IWL_MVM_STATION_COUNT) { |
8ca151b5 JB |
1130 | IWL_ERR(mvm, "Failed to find station id\n"); |
1131 | return -EINVAL; | |
1132 | } | |
1133 | ||
1134 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { | |
1135 | ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); | |
1136 | goto end; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * It is possible that the 'sta' parameter is NULL, and thus | |
1141 | * there is a need to retrieve the sta from the local station table. | |
1142 | */ | |
1143 | if (!sta) { | |
1144 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1145 | lockdep_is_held(&mvm->mutex)); | |
1146 | if (IS_ERR_OR_NULL(sta)) { | |
1147 | IWL_ERR(mvm, "Invalid station id\n"); | |
1148 | return -EINVAL; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; | |
1153 | if (WARN_ON_ONCE(mvm_sta->vif != vif)) | |
1154 | return -EINVAL; | |
1155 | ||
1156 | if (!have_key_offset) { | |
1157 | /* | |
1158 | * The D3 firmware hardcodes the PTK offset to 0, so we have to | |
1159 | * configure it there. As a result, this workaround exists to | |
1160 | * let the caller set the key offset (hw_key_idx), see d3.c. | |
1161 | */ | |
1162 | keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm); | |
1163 | if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) | |
1164 | return -ENOSPC; | |
1165 | } | |
1166 | ||
1167 | switch (keyconf->cipher) { | |
1168 | case WLAN_CIPHER_SUITE_TKIP: | |
1169 | addr = iwl_mvm_get_mac_addr(mvm, vif, sta); | |
1170 | /* get phase 1 key from mac80211 */ | |
1171 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1172 | ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); | |
1173 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, | |
1174 | seq.tkip.iv32, p1k, CMD_SYNC); | |
1175 | break; | |
1176 | case WLAN_CIPHER_SUITE_CCMP: | |
1177 | ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, | |
1178 | 0, NULL, CMD_SYNC); | |
1179 | break; | |
1180 | default: | |
1181 | IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher); | |
1182 | ret = -EINVAL; | |
1183 | } | |
1184 | ||
1185 | if (ret) | |
1186 | __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1187 | ||
1188 | end: | |
1189 | IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", | |
1190 | keyconf->cipher, keyconf->keylen, keyconf->keyidx, | |
1191 | sta->addr, ret); | |
1192 | return ret; | |
1193 | } | |
1194 | ||
1195 | int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, | |
1196 | struct ieee80211_vif *vif, | |
1197 | struct ieee80211_sta *sta, | |
1198 | struct ieee80211_key_conf *keyconf) | |
1199 | { | |
1200 | struct iwl_mvm_sta *mvm_sta; | |
1201 | struct iwl_mvm_add_sta_cmd cmd = {}; | |
1202 | __le16 key_flags; | |
1203 | int ret, status; | |
1204 | u8 sta_id; | |
1205 | ||
1206 | lockdep_assert_held(&mvm->mutex); | |
1207 | ||
1208 | /* Get the station id from the mvm local station table */ | |
1209 | sta_id = iwl_mvm_get_key_sta_id(vif, sta); | |
1210 | ||
1211 | IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", | |
1212 | keyconf->keyidx, sta_id); | |
1213 | ||
1214 | if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) | |
1215 | return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); | |
1216 | ||
1217 | ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); | |
1218 | if (!ret) { | |
1219 | IWL_ERR(mvm, "offset %d not used in fw key table.\n", | |
1220 | keyconf->hw_key_idx); | |
1221 | return -ENOENT; | |
1222 | } | |
1223 | ||
881acd89 | 1224 | if (sta_id == IWL_MVM_STATION_COUNT) { |
8ca151b5 JB |
1225 | IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | /* | |
1230 | * It is possible that the 'sta' parameter is NULL, and thus | |
1231 | * there is a need to retrieve the sta from the local station table, | |
1232 | * for example when a GTK is removed (where the sta_id will then be | |
1233 | * the AP ID, and no station was passed by mac80211.) | |
1234 | */ | |
1235 | if (!sta) { | |
1236 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], | |
1237 | lockdep_is_held(&mvm->mutex)); | |
1238 | if (!sta) { | |
1239 | IWL_ERR(mvm, "Invalid station id\n"); | |
1240 | return -EINVAL; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; | |
1245 | if (WARN_ON_ONCE(mvm_sta->vif != vif)) | |
1246 | return -EINVAL; | |
1247 | ||
8115efbd EG |
1248 | key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & |
1249 | STA_KEY_FLG_KEYID_MSK); | |
8ca151b5 JB |
1250 | key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); |
1251 | key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); | |
1252 | ||
1253 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1254 | key_flags |= cpu_to_le16(STA_KEY_MULTICAST); | |
1255 | ||
1256 | cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); | |
1257 | cmd.key.key_flags = key_flags; | |
1258 | cmd.key.key_offset = keyconf->hw_key_idx; | |
1259 | cmd.sta_id = sta_id; | |
1260 | ||
1261 | cmd.modify_mask = STA_MODIFY_KEY; | |
1262 | cmd.add_modify = STA_MODE_MODIFY; | |
1263 | ||
1264 | status = ADD_STA_SUCCESS; | |
1265 | ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), | |
1266 | &cmd, &status); | |
1267 | ||
1268 | switch (status) { | |
1269 | case ADD_STA_SUCCESS: | |
1270 | IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); | |
1271 | break; | |
1272 | default: | |
1273 | ret = -EIO; | |
1274 | IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); | |
1275 | break; | |
1276 | } | |
1277 | ||
1278 | return ret; | |
1279 | } | |
1280 | ||
1281 | void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, | |
1282 | struct ieee80211_vif *vif, | |
1283 | struct ieee80211_key_conf *keyconf, | |
1284 | struct ieee80211_sta *sta, u32 iv32, | |
1285 | u16 *phase1key) | |
1286 | { | |
c3eb536a | 1287 | struct iwl_mvm_sta *mvm_sta; |
8ca151b5 JB |
1288 | u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); |
1289 | ||
881acd89 | 1290 | if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
1291 | return; |
1292 | ||
c3eb536a BL |
1293 | rcu_read_lock(); |
1294 | ||
1295 | if (!sta) { | |
1296 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1297 | if (WARN_ON(IS_ERR_OR_NULL(sta))) { | |
1298 | rcu_read_unlock(); | |
1299 | return; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | mvm_sta = (void *)sta->drv_priv; | |
8ca151b5 JB |
1304 | iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, |
1305 | iv32, phase1key, CMD_ASYNC); | |
c3eb536a | 1306 | rcu_read_unlock(); |
8ca151b5 JB |
1307 | } |
1308 | ||
9cc40712 JB |
1309 | void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, |
1310 | struct ieee80211_sta *sta) | |
8ca151b5 | 1311 | { |
9cc40712 | 1312 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; |
8ca151b5 JB |
1313 | struct iwl_mvm_add_sta_cmd cmd = { |
1314 | .add_modify = STA_MODE_MODIFY, | |
9cc40712 | 1315 | .sta_id = mvmsta->sta_id, |
5af01772 | 1316 | .station_flags_msk = cpu_to_le32(STA_FLG_PS), |
9cc40712 | 1317 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), |
8ca151b5 JB |
1318 | }; |
1319 | int ret; | |
1320 | ||
8ca151b5 JB |
1321 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); |
1322 | if (ret) | |
1323 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1324 | } | |
1325 | ||
9cc40712 JB |
1326 | void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, |
1327 | struct ieee80211_sta *sta, | |
8ca151b5 JB |
1328 | enum ieee80211_frame_release_type reason, |
1329 | u16 cnt) | |
1330 | { | |
1331 | u16 sleep_state_flags = | |
1332 | (reason == IEEE80211_FRAME_RELEASE_UAPSD) ? | |
1333 | STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL; | |
9cc40712 | 1334 | struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; |
8ca151b5 JB |
1335 | struct iwl_mvm_add_sta_cmd cmd = { |
1336 | .add_modify = STA_MODE_MODIFY, | |
9cc40712 | 1337 | .sta_id = mvmsta->sta_id, |
8ca151b5 JB |
1338 | .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, |
1339 | .sleep_tx_count = cpu_to_le16(cnt), | |
9cc40712 | 1340 | .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), |
8ca151b5 JB |
1341 | /* |
1342 | * Same modify mask for sleep_tx_count and sleep_state_flags so | |
1343 | * we must set the sleep_state_flags too. | |
1344 | */ | |
1345 | .sleep_state_flags = cpu_to_le16(sleep_state_flags), | |
1346 | }; | |
1347 | int ret; | |
1348 | ||
1349 | /* TODO: somehow the fw doesn't seem to take PS_POLL into account */ | |
1350 | ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); | |
1351 | if (ret) | |
1352 | IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); | |
1353 | } |