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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 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
c779273b | 9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of version 2 of the GNU General Public License as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
23 | * USA | |
24 | * | |
25 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 26 | * in the file called COPYING. |
8ca151b5 JB |
27 | * |
28 | * Contact Information: | |
29 | * Intel Linux Wireless <ilw@linux.intel.com> | |
30 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
31 | * | |
32 | * BSD LICENSE | |
33 | * | |
51368bf7 | 34 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
c779273b | 35 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
36 | * All rights reserved. |
37 | * | |
38 | * Redistribution and use in source and binary forms, with or without | |
39 | * modification, are permitted provided that the following conditions | |
40 | * are met: | |
41 | * | |
42 | * * Redistributions of source code must retain the above copyright | |
43 | * notice, this list of conditions and the following disclaimer. | |
44 | * * Redistributions in binary form must reproduce the above copyright | |
45 | * notice, this list of conditions and the following disclaimer in | |
46 | * the documentation and/or other materials provided with the | |
47 | * distribution. | |
48 | * * Neither the name Intel Corporation nor the names of its | |
49 | * contributors may be used to endorse or promote products derived | |
50 | * from this software without specific prior written permission. | |
51 | * | |
52 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
53 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
54 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
55 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
56 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
57 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
58 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
59 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
60 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
61 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
62 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
63 | * | |
64 | *****************************************************************************/ | |
65 | ||
66 | #include <linux/jiffies.h> | |
67 | #include <net/mac80211.h> | |
68 | ||
69 | #include "iwl-notif-wait.h" | |
70 | #include "iwl-trans.h" | |
71 | #include "fw-api.h" | |
72 | #include "time-event.h" | |
73 | #include "mvm.h" | |
74 | #include "iwl-io.h" | |
75 | #include "iwl-prph.h" | |
2f89a5d7 | 76 | #include "fw-dbg.h" |
8ca151b5 | 77 | |
e635c797 IP |
78 | /* |
79 | * For the high priority TE use a time event type that has similar priority to | |
80 | * the FW's action scan priority. | |
456f6ddf | 81 | */ |
e635c797 IP |
82 | #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
83 | #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC | |
456f6ddf | 84 | |
8ca151b5 JB |
85 | void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
86 | struct iwl_mvm_time_event_data *te_data) | |
87 | { | |
88 | lockdep_assert_held(&mvm->time_event_lock); | |
89 | ||
00fd233a | 90 | if (!te_data->vif) |
8ca151b5 JB |
91 | return; |
92 | ||
93 | list_del(&te_data->list); | |
94 | te_data->running = false; | |
95 | te_data->uid = 0; | |
96 | te_data->id = TE_MAX; | |
97 | te_data->vif = NULL; | |
98 | } | |
99 | ||
100 | void iwl_mvm_roc_done_wk(struct work_struct *wk) | |
101 | { | |
102 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); | |
b112889c AM |
103 | u32 queues = 0; |
104 | ||
105 | /* | |
106 | * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. | |
107 | * This will cause the TX path to drop offchannel transmissions. | |
108 | * That would also be done by mac80211, but it is racy, in particular | |
109 | * in the case that the time event actually completed in the firmware | |
110 | * (which is handled in iwl_mvm_te_handle_notif). | |
111 | */ | |
c779273b | 112 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) { |
b112889c | 113 | queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE); |
c779273b EP |
114 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); |
115 | } | |
116 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) { | |
b112889c | 117 | queues |= BIT(mvm->aux_queue); |
c779273b EP |
118 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX); |
119 | } | |
8ca151b5 JB |
120 | |
121 | synchronize_net(); | |
122 | ||
123 | /* | |
124 | * Flush the offchannel queue -- this is called when the time | |
0d365ae5 | 125 | * event finishes or is canceled, so that frames queued for it |
8ca151b5 JB |
126 | * won't get stuck on the queue and be transmitted in the next |
127 | * time event. | |
128 | * We have to send the command asynchronously since this cannot | |
129 | * be under the mutex for locking reasons, but that's not an | |
130 | * issue as it will have to complete before the next command is | |
131 | * executed, and a new time event means a new command. | |
132 | */ | |
5888a40c | 133 | iwl_mvm_flush_tx_path(mvm, queues, CMD_ASYNC); |
8ca151b5 JB |
134 | } |
135 | ||
136 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
137 | { | |
8ca151b5 JB |
138 | /* |
139 | * Of course, our status bit is just as racy as mac80211, so in | |
140 | * addition, fire off the work struct which will drop all frames | |
141 | * from the hardware queues that made it through the race. First | |
142 | * it will of course synchronize the TX path to make sure that | |
143 | * any *new* TX will be rejected. | |
144 | */ | |
145 | schedule_work(&mvm->roc_done_wk); | |
146 | } | |
147 | ||
7f0a7c67 AO |
148 | static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
149 | { | |
150 | struct ieee80211_vif *csa_vif; | |
151 | ||
152 | rcu_read_lock(); | |
153 | ||
154 | csa_vif = rcu_dereference(mvm->csa_vif); | |
155 | if (!csa_vif || !csa_vif->csa_active) | |
156 | goto out_unlock; | |
157 | ||
158 | IWL_DEBUG_TE(mvm, "CSA NOA started\n"); | |
159 | ||
160 | /* | |
161 | * CSA NoA is started but we still have beacons to | |
162 | * transmit on the current channel. | |
163 | * So we just do nothing here and the switch | |
164 | * will be performed on the last TBTT. | |
165 | */ | |
166 | if (!ieee80211_csa_is_complete(csa_vif)) { | |
167 | IWL_WARN(mvm, "CSA NOA started too early\n"); | |
168 | goto out_unlock; | |
169 | } | |
170 | ||
171 | ieee80211_csa_finish(csa_vif); | |
172 | ||
173 | rcu_read_unlock(); | |
174 | ||
175 | RCU_INIT_POINTER(mvm->csa_vif, NULL); | |
176 | ||
177 | return; | |
178 | ||
179 | out_unlock: | |
180 | rcu_read_unlock(); | |
181 | } | |
182 | ||
05739794 JB |
183 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
184 | struct ieee80211_vif *vif, | |
185 | const char *errmsg) | |
186 | { | |
187 | if (vif->type != NL80211_IFTYPE_STATION) | |
188 | return false; | |
189 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
190 | return false; | |
191 | if (errmsg) | |
192 | IWL_ERR(mvm, "%s\n", errmsg); | |
31755207 EG |
193 | |
194 | iwl_mvm_connection_loss(mvm, vif, errmsg); | |
05739794 JB |
195 | return true; |
196 | } | |
197 | ||
dc88b4ba LC |
198 | static void |
199 | iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, | |
200 | struct iwl_mvm_time_event_data *te_data, | |
201 | struct iwl_time_event_notif *notif) | |
202 | { | |
81d62d5a JB |
203 | struct ieee80211_vif *vif = te_data->vif; |
204 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
205 | ||
206 | if (!notif->status) | |
dc88b4ba | 207 | IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); |
dc88b4ba LC |
208 | |
209 | switch (te_data->vif->type) { | |
210 | case NL80211_IFTYPE_AP: | |
81d62d5a JB |
211 | if (!notif->status) |
212 | mvmvif->csa_failed = true; | |
dc88b4ba LC |
213 | iwl_mvm_csa_noa_start(mvm); |
214 | break; | |
215 | case NL80211_IFTYPE_STATION: | |
81d62d5a | 216 | if (!notif->status) { |
31755207 EG |
217 | iwl_mvm_connection_loss(mvm, vif, |
218 | "CSA TE failed to start"); | |
81d62d5a JB |
219 | break; |
220 | } | |
dc88b4ba | 221 | iwl_mvm_csa_client_absent(mvm, te_data->vif); |
622e3f9b | 222 | ieee80211_chswitch_done(te_data->vif, true); |
dc88b4ba LC |
223 | break; |
224 | default: | |
225 | /* should never happen */ | |
226 | WARN_ON_ONCE(1); | |
227 | break; | |
228 | } | |
229 | ||
230 | /* we don't need it anymore */ | |
231 | iwl_mvm_te_clear_data(mvm, te_data); | |
232 | } | |
233 | ||
874c174e EG |
234 | static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, |
235 | struct iwl_time_event_notif *notif, | |
236 | struct iwl_mvm_time_event_data *te_data) | |
237 | { | |
238 | struct iwl_fw_dbg_trigger_tlv *trig; | |
239 | struct iwl_fw_dbg_trigger_time_event *te_trig; | |
240 | int i; | |
241 | ||
242 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT)) | |
243 | return; | |
244 | ||
245 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT); | |
246 | te_trig = (void *)trig->data; | |
247 | ||
248 | if (!iwl_fw_dbg_trigger_check_stop(mvm, te_data->vif, trig)) | |
249 | return; | |
250 | ||
251 | for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { | |
252 | u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); | |
253 | u32 trig_action_bitmap = | |
254 | le32_to_cpu(te_trig->time_events[i].action_bitmap); | |
255 | u32 trig_status_bitmap = | |
256 | le32_to_cpu(te_trig->time_events[i].status_bitmap); | |
257 | ||
258 | if (trig_te_id != te_data->id || | |
259 | !(trig_action_bitmap & le32_to_cpu(notif->action)) || | |
260 | !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) | |
261 | continue; | |
262 | ||
263 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
264 | "Time event %d Action 0x%x received status: %d", | |
265 | te_data->id, | |
266 | le32_to_cpu(notif->action), | |
267 | le32_to_cpu(notif->status)); | |
268 | break; | |
269 | } | |
270 | } | |
271 | ||
8ca151b5 JB |
272 | /* |
273 | * Handles a FW notification for an event that is known to the driver. | |
274 | * | |
275 | * @mvm: the mvm component | |
276 | * @te_data: the time event data | |
277 | * @notif: the notification data corresponding the time event data. | |
278 | */ | |
279 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
280 | struct iwl_mvm_time_event_data *te_data, | |
281 | struct iwl_time_event_notif *notif) | |
282 | { | |
283 | lockdep_assert_held(&mvm->time_event_lock); | |
284 | ||
285 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
286 | le32_to_cpu(notif->unique_id), | |
287 | le32_to_cpu(notif->action)); | |
288 | ||
874c174e EG |
289 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
290 | ||
8ca151b5 JB |
291 | /* |
292 | * The FW sends the start/end time event notifications even for events | |
293 | * that it fails to schedule. This is indicated in the status field of | |
294 | * the notification. This happens in cases that the scheduler cannot | |
295 | * find a schedule that can handle the event (for example requesting a | |
296 | * P2P Device discoveribility, while there are other higher priority | |
297 | * events in the system). | |
298 | */ | |
9fc3fe96 | 299 | if (!le32_to_cpu(notif->status)) { |
bcd535eb JB |
300 | const char *msg; |
301 | ||
302 | if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) | |
303 | msg = "Time Event start notification failure"; | |
304 | else | |
305 | msg = "Time Event end notification failure"; | |
306 | ||
307 | IWL_DEBUG_TE(mvm, "%s\n", msg); | |
308 | ||
309 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { | |
05739794 JB |
310 | iwl_mvm_te_clear_data(mvm, te_data); |
311 | return; | |
312 | } | |
313 | } | |
8ca151b5 | 314 | |
f8f03c3e | 315 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
316 | IWL_DEBUG_TE(mvm, |
317 | "TE ended - current time %lu, estimated end %lu\n", | |
318 | jiffies, te_data->end_jiffies); | |
319 | ||
bca13904 JB |
320 | switch (te_data->vif->type) { |
321 | case NL80211_IFTYPE_P2P_DEVICE: | |
8ca151b5 JB |
322 | ieee80211_remain_on_channel_expired(mvm->hw); |
323 | iwl_mvm_roc_finished(mvm); | |
bca13904 JB |
324 | break; |
325 | case NL80211_IFTYPE_STATION: | |
326 | /* | |
327 | * By now, we should have finished association | |
328 | * and know the dtim period. | |
329 | */ | |
330 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, | |
331 | "No association and the time event is over already..."); | |
332 | break; | |
333 | default: | |
334 | break; | |
8ca151b5 JB |
335 | } |
336 | ||
8ca151b5 | 337 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 338 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 339 | te_data->running = true; |
e7f1935c | 340 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
341 | |
342 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
343 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 344 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 | 345 | ieee80211_ready_on_channel(mvm->hw); |
dc88b4ba LC |
346 | } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
347 | iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); | |
8ca151b5 JB |
348 | } |
349 | } else { | |
350 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
351 | } | |
352 | } | |
353 | ||
b112889c AM |
354 | /* |
355 | * Handle A Aux ROC time event | |
356 | */ | |
357 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
358 | struct iwl_time_event_notif *notif) | |
359 | { | |
360 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
361 | bool aux_roc_te = false; | |
362 | ||
363 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
364 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
365 | aux_roc_te = true; | |
366 | break; | |
367 | } | |
368 | } | |
369 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
370 | return -EINVAL; | |
371 | ||
874c174e EG |
372 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
373 | ||
b112889c AM |
374 | if (!le32_to_cpu(notif->status)) { |
375 | IWL_DEBUG_TE(mvm, | |
376 | "ERROR: Aux ROC Time Event %s notification failure\n", | |
377 | (le32_to_cpu(notif->action) & | |
378 | TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
382 | IWL_DEBUG_TE(mvm, | |
383 | "Aux ROC time event notification - UID = 0x%x action %d\n", | |
384 | le32_to_cpu(notif->unique_id), | |
385 | le32_to_cpu(notif->action)); | |
386 | ||
387 | if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
388 | /* End TE, notify mac80211 */ | |
389 | ieee80211_remain_on_channel_expired(mvm->hw); | |
390 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
391 | list_del(&te_data->list); /* remove from list */ | |
392 | te_data->running = false; | |
393 | te_data->vif = NULL; | |
394 | te_data->uid = 0; | |
a6cc5163 | 395 | te_data->id = TE_MAX; |
b112889c | 396 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
b112889c AM |
397 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
398 | te_data->running = true; | |
c779273b | 399 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC_AUX); |
b112889c AM |
400 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ |
401 | } else { | |
402 | IWL_DEBUG_TE(mvm, | |
403 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
404 | le32_to_cpu(notif->action)); | |
405 | return -EINVAL; | |
406 | } | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
8ca151b5 JB |
411 | /* |
412 | * The Rx handler for time event notifications | |
413 | */ | |
0416841d JB |
414 | void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, |
415 | struct iwl_rx_cmd_buffer *rxb) | |
8ca151b5 JB |
416 | { |
417 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
418 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
419 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
420 | ||
421 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
422 | le32_to_cpu(notif->unique_id), | |
423 | le32_to_cpu(notif->action)); | |
424 | ||
425 | spin_lock_bh(&mvm->time_event_lock); | |
b112889c AM |
426 | /* This time event is triggered for Aux ROC request */ |
427 | if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) | |
428 | goto unlock; | |
429 | ||
8ca151b5 JB |
430 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
431 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
432 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
433 | } | |
b112889c | 434 | unlock: |
8ca151b5 | 435 | spin_unlock_bh(&mvm->time_event_lock); |
8ca151b5 JB |
436 | } |
437 | ||
d20d37bc LK |
438 | static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
439 | struct iwl_rx_packet *pkt, void *data) | |
440 | { | |
441 | struct iwl_mvm *mvm = | |
442 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
443 | struct iwl_mvm_time_event_data *te_data = data; | |
444 | struct iwl_time_event_notif *resp; | |
445 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
446 | ||
447 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) | |
448 | return true; | |
449 | ||
450 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
451 | IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); | |
452 | return true; | |
453 | } | |
454 | ||
455 | resp = (void *)pkt->data; | |
456 | ||
457 | /* te_data->uid is already set in the TIME_EVENT_CMD response */ | |
458 | if (le32_to_cpu(resp->unique_id) != te_data->uid) | |
459 | return false; | |
460 | ||
461 | IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", | |
462 | te_data->uid); | |
463 | if (!resp->status) | |
464 | IWL_ERR(mvm, | |
465 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
466 | ||
467 | return true; | |
468 | } | |
469 | ||
ffdf968d JB |
470 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
471 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
472 | { |
473 | struct iwl_mvm *mvm = | |
474 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
475 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 476 | struct iwl_time_event_resp *resp; |
65b30348 | 477 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 478 | |
ffdf968d JB |
479 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
480 | return true; | |
8ca151b5 | 481 | |
65b30348 | 482 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
483 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
484 | return true; | |
485 | } | |
8ca151b5 | 486 | |
ffdf968d | 487 | resp = (void *)pkt->data; |
e3722822 JB |
488 | |
489 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
490 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
491 | return false; | |
492 | ||
ffdf968d JB |
493 | te_data->uid = le32_to_cpu(resp->unique_id); |
494 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
495 | te_data->uid); | |
496 | return true; | |
497 | } | |
8ca151b5 | 498 | |
ffdf968d JB |
499 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
500 | struct ieee80211_vif *vif, | |
501 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 502 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d | 503 | { |
6eb031d2 | 504 | static const u16 time_event_response[] = { TIME_EVENT_CMD }; |
ffdf968d JB |
505 | struct iwl_notification_wait wait_time_event; |
506 | int ret; | |
507 | ||
508 | lockdep_assert_held(&mvm->mutex); | |
509 | ||
93630dc3 JB |
510 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
511 | le32_to_cpu(te_cmd->duration)); | |
512 | ||
ffdf968d JB |
513 | spin_lock_bh(&mvm->time_event_lock); |
514 | if (WARN_ON(te_data->id != TE_MAX)) { | |
515 | spin_unlock_bh(&mvm->time_event_lock); | |
516 | return -EIO; | |
517 | } | |
518 | te_data->vif = vif; | |
519 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
520 | te_data->id = le32_to_cpu(te_cmd->id); | |
521 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
522 | spin_unlock_bh(&mvm->time_event_lock); | |
523 | ||
524 | /* | |
525 | * Use a notification wait, which really just processes the | |
526 | * command response and doesn't wait for anything, in order | |
527 | * to be able to process the response and get the UID inside | |
528 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
529 | * stores the buffer and then wakes up this thread, by which | |
530 | * time another notification (that the time event started) | |
531 | * might already be processed unsuccessfully. | |
532 | */ | |
533 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
534 | time_event_response, | |
535 | ARRAY_SIZE(time_event_response), | |
536 | iwl_mvm_time_event_response, te_data); | |
537 | ||
a1022927 | 538 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 539 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
540 | if (ret) { |
541 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
542 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
543 | goto out_clear_te; | |
544 | } | |
8ca151b5 | 545 | |
ffdf968d JB |
546 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
547 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
548 | /* should never fail */ | |
549 | WARN_ON_ONCE(ret); | |
550 | ||
551 | if (ret) { | |
552 | out_clear_te: | |
553 | spin_lock_bh(&mvm->time_event_lock); | |
554 | iwl_mvm_te_clear_data(mvm, te_data); | |
555 | spin_unlock_bh(&mvm->time_event_lock); | |
556 | } | |
557 | return ret; | |
8ca151b5 JB |
558 | } |
559 | ||
560 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
561 | struct ieee80211_vif *vif, | |
016d27e1 | 562 | u32 duration, u32 min_duration, |
d20d37bc | 563 | u32 max_delay, bool wait_for_notif) |
8ca151b5 JB |
564 | { |
565 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
566 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
6eb031d2 | 567 | const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
d20d37bc | 568 | struct iwl_notification_wait wait_te_notif; |
a373f67c | 569 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
570 | |
571 | lockdep_assert_held(&mvm->mutex); | |
572 | ||
573 | if (te_data->running && | |
e7f1935c | 574 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
575 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
576 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
577 | return; | |
578 | } | |
579 | ||
580 | if (te_data->running) { | |
581 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
582 | te_data->uid, | |
583 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
584 | /* | |
585 | * we don't have enough time | |
586 | * cancel the current TE and issue a new one | |
587 | * Of course it would be better to remove the old one only | |
588 | * when the new one is added, but we don't care if we are off | |
589 | * channel for a bit. All we need to do, is not to return | |
590 | * before we actually begin to be on the channel. | |
591 | */ | |
592 | iwl_mvm_stop_session_protection(mvm, vif); | |
593 | } | |
594 | ||
8ca151b5 JB |
595 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
596 | time_cmd.id_and_color = | |
597 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
598 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
599 | ||
5bf12f60 | 600 | time_cmd.apply_time = cpu_to_le32(0); |
ffdf968d | 601 | |
f8f03c3e | 602 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 603 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
604 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
605 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 606 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
607 | time_cmd.repeat = 1; |
608 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
609 | TE_V2_NOTIF_HOST_EVENT_END | |
610 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 611 | |
d20d37bc LK |
612 | if (!wait_for_notif) { |
613 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
614 | return; | |
615 | } | |
616 | ||
617 | /* | |
618 | * Create notification_wait for the TIME_EVENT_NOTIFICATION to use | |
619 | * right after we send the time event | |
620 | */ | |
621 | iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, | |
622 | te_notif_response, | |
623 | ARRAY_SIZE(te_notif_response), | |
624 | iwl_mvm_te_notif, te_data); | |
625 | ||
626 | /* If TE was sent OK - wait for the notification that started */ | |
627 | if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { | |
628 | IWL_ERR(mvm, "Failed to add TE to protect session\n"); | |
629 | iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); | |
630 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, | |
631 | TU_TO_JIFFIES(max_delay))) { | |
632 | IWL_ERR(mvm, "Failed to protect session until TE\n"); | |
633 | } | |
8ca151b5 JB |
634 | } |
635 | ||
bf5da87f MG |
636 | static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
637 | struct iwl_mvm_time_event_data *te_data, | |
638 | u32 *uid) | |
8ca151b5 | 639 | { |
bf5da87f | 640 | u32 id; |
8ca151b5 JB |
641 | |
642 | /* | |
643 | * It is possible that by the time we got to this point the time | |
644 | * event was already removed. | |
645 | */ | |
646 | spin_lock_bh(&mvm->time_event_lock); | |
647 | ||
648 | /* Save time event uid before clearing its data */ | |
bf5da87f | 649 | *uid = te_data->uid; |
8ca151b5 JB |
650 | id = te_data->id; |
651 | ||
652 | /* | |
653 | * The clear_data function handles time events that were already removed | |
654 | */ | |
655 | iwl_mvm_te_clear_data(mvm, te_data); | |
656 | spin_unlock_bh(&mvm->time_event_lock); | |
657 | ||
658 | /* | |
659 | * It is possible that by the time we try to remove it, the time event | |
660 | * has already ended and removed. In such a case there is no need to | |
661 | * send a removal command. | |
662 | */ | |
663 | if (id == TE_MAX) { | |
bf5da87f MG |
664 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
665 | return false; | |
8ca151b5 JB |
666 | } |
667 | ||
bf5da87f MG |
668 | return true; |
669 | } | |
670 | ||
671 | /* | |
672 | * Explicit request to remove a aux roc time event. The removal of a time | |
673 | * event needs to be synchronized with the flow of a time event's end | |
674 | * notification, which also removes the time event from the op mode | |
675 | * data structures. | |
676 | */ | |
677 | static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, | |
678 | struct iwl_mvm_vif *mvmvif, | |
679 | struct iwl_mvm_time_event_data *te_data) | |
680 | { | |
681 | struct iwl_hs20_roc_req aux_cmd = {}; | |
682 | u32 uid; | |
683 | int ret; | |
684 | ||
685 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
686 | return; | |
687 | ||
688 | aux_cmd.event_unique_id = cpu_to_le32(uid); | |
689 | aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
690 | aux_cmd.id_and_color = | |
691 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
692 | IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", | |
693 | le32_to_cpu(aux_cmd.event_unique_id)); | |
694 | ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, | |
695 | sizeof(aux_cmd), &aux_cmd); | |
696 | ||
697 | if (WARN_ON(ret)) | |
698 | return; | |
699 | } | |
700 | ||
701 | /* | |
702 | * Explicit request to remove a time event. The removal of a time event needs to | |
703 | * be synchronized with the flow of a time event's end notification, which also | |
704 | * removes the time event from the op mode data structures. | |
705 | */ | |
706 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
707 | struct iwl_mvm_vif *mvmvif, | |
708 | struct iwl_mvm_time_event_data *te_data) | |
709 | { | |
710 | struct iwl_time_event_cmd time_cmd = {}; | |
711 | u32 uid; | |
712 | int ret; | |
713 | ||
714 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
715 | return; | |
716 | ||
8ca151b5 JB |
717 | /* When we remove a TE, the UID is to be set in the id field */ |
718 | time_cmd.id = cpu_to_le32(uid); | |
719 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
720 | time_cmd.id_and_color = | |
721 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
722 | ||
723 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 724 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 725 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
726 | if (WARN_ON(ret)) |
727 | return; | |
728 | } | |
729 | ||
730 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
731 | struct ieee80211_vif *vif) | |
732 | { | |
733 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
734 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
735 | ||
736 | lockdep_assert_held(&mvm->mutex); | |
737 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
738 | } | |
739 | ||
8ca151b5 | 740 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 741 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
742 | { |
743 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
744 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 745 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
746 | |
747 | lockdep_assert_held(&mvm->mutex); | |
748 | if (te_data->running) { | |
749 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
750 | return -EBUSY; | |
751 | } | |
752 | ||
753 | /* | |
754 | * Flush the done work, just in case it's still pending, so that | |
755 | * the work it does can complete and we can accept new frames. | |
756 | */ | |
757 | flush_work(&mvm->roc_done_wk); | |
758 | ||
8ca151b5 JB |
759 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
760 | time_cmd.id_and_color = | |
761 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
762 | |
763 | switch (type) { | |
764 | case IEEE80211_ROC_TYPE_NORMAL: | |
765 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
766 | break; | |
767 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
768 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
769 | break; | |
770 | default: | |
771 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
772 | return -EINVAL; | |
773 | } | |
8ca151b5 JB |
774 | |
775 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
776 | time_cmd.interval = cpu_to_le32(1); |
777 | ||
778 | /* | |
e635c797 | 779 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 780 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
781 | * scheduled. To improve the chances of it being scheduled, allow them |
782 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 783 | */ |
f8f03c3e | 784 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
785 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
786 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
787 | time_cmd.repeat = 1; |
788 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
789 | TE_V2_NOTIF_HOST_EVENT_END | |
790 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 791 | |
ffdf968d | 792 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
793 | } |
794 | ||
bf5da87f | 795 | void iwl_mvm_stop_roc(struct iwl_mvm *mvm) |
8ca151b5 | 796 | { |
ebf17ff9 | 797 | struct iwl_mvm_vif *mvmvif = NULL; |
8ca151b5 | 798 | struct iwl_mvm_time_event_data *te_data; |
bf5da87f | 799 | bool is_p2p = false; |
8ca151b5 JB |
800 | |
801 | lockdep_assert_held(&mvm->mutex); | |
802 | ||
bf5da87f MG |
803 | spin_lock_bh(&mvm->time_event_lock); |
804 | ||
8ca151b5 JB |
805 | /* |
806 | * Iterate over the list of time events and find the time event that is | |
807 | * associated with a P2P_DEVICE interface. | |
808 | * This assumes that a P2P_DEVICE interface can have only a single time | |
809 | * event at any given time and this time event coresponds to a ROC | |
810 | * request | |
811 | */ | |
8ca151b5 | 812 | list_for_each_entry(te_data, &mvm->time_event_list, list) { |
833d9b97 | 813 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
8ca151b5 | 814 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
bf5da87f MG |
815 | is_p2p = true; |
816 | goto remove_te; | |
817 | } | |
818 | } | |
819 | ||
ebf17ff9 JB |
820 | /* There can only be at most one AUX ROC time event, we just use the |
821 | * list to simplify/unify code. Remove it if it exists. | |
bf5da87f | 822 | */ |
ebf17ff9 JB |
823 | te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, |
824 | struct iwl_mvm_time_event_data, | |
825 | list); | |
826 | if (te_data) | |
833d9b97 | 827 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
bf5da87f MG |
828 | |
829 | remove_te: | |
8ca151b5 JB |
830 | spin_unlock_bh(&mvm->time_event_lock); |
831 | ||
832 | if (!mvmvif) { | |
bf5da87f | 833 | IWL_WARN(mvm, "No remain on channel event\n"); |
8ca151b5 JB |
834 | return; |
835 | } | |
836 | ||
bf5da87f MG |
837 | if (is_p2p) |
838 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
839 | else | |
840 | iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); | |
8ca151b5 JB |
841 | |
842 | iwl_mvm_roc_finished(mvm); | |
843 | } | |
7f0a7c67 | 844 | |
f991e17b LC |
845 | int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
846 | struct ieee80211_vif *vif, | |
847 | u32 duration, u32 apply_time) | |
7f0a7c67 AO |
848 | { |
849 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
850 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
851 | struct iwl_time_event_cmd time_cmd = {}; | |
852 | ||
853 | lockdep_assert_held(&mvm->mutex); | |
854 | ||
855 | if (te_data->running) { | |
f991e17b | 856 | IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); |
7f0a7c67 AO |
857 | return -EBUSY; |
858 | } | |
859 | ||
860 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
861 | time_cmd.id_and_color = | |
862 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
f991e17b | 863 | time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
7f0a7c67 AO |
864 | time_cmd.apply_time = cpu_to_le32(apply_time); |
865 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
866 | time_cmd.duration = cpu_to_le32(duration); | |
867 | time_cmd.repeat = 1; | |
868 | time_cmd.interval = cpu_to_le32(1); | |
869 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
870 | TE_V2_ABSENCE); | |
871 | ||
872 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
873 | } |