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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" | |
76 | ||
e635c797 IP |
77 | /* |
78 | * For the high priority TE use a time event type that has similar priority to | |
79 | * the FW's action scan priority. | |
456f6ddf | 80 | */ |
e635c797 IP |
81 | #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
82 | #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC | |
456f6ddf | 83 | |
8ca151b5 JB |
84 | void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
85 | struct iwl_mvm_time_event_data *te_data) | |
86 | { | |
87 | lockdep_assert_held(&mvm->time_event_lock); | |
88 | ||
89 | if (te_data->id == TE_MAX) | |
90 | return; | |
91 | ||
92 | list_del(&te_data->list); | |
93 | te_data->running = false; | |
94 | te_data->uid = 0; | |
95 | te_data->id = TE_MAX; | |
96 | te_data->vif = NULL; | |
97 | } | |
98 | ||
99 | void iwl_mvm_roc_done_wk(struct work_struct *wk) | |
100 | { | |
101 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); | |
b112889c AM |
102 | u32 queues = 0; |
103 | ||
104 | /* | |
105 | * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. | |
106 | * This will cause the TX path to drop offchannel transmissions. | |
107 | * That would also be done by mac80211, but it is racy, in particular | |
108 | * in the case that the time event actually completed in the firmware | |
109 | * (which is handled in iwl_mvm_te_handle_notif). | |
110 | */ | |
c779273b | 111 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) { |
b112889c | 112 | queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE); |
c779273b EP |
113 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); |
114 | } | |
115 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) { | |
b112889c | 116 | queues |= BIT(mvm->aux_queue); |
c779273b EP |
117 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX); |
118 | } | |
8ca151b5 JB |
119 | |
120 | synchronize_net(); | |
121 | ||
122 | /* | |
123 | * Flush the offchannel queue -- this is called when the time | |
0d365ae5 | 124 | * event finishes or is canceled, so that frames queued for it |
8ca151b5 JB |
125 | * won't get stuck on the queue and be transmitted in the next |
126 | * time event. | |
127 | * We have to send the command asynchronously since this cannot | |
128 | * be under the mutex for locking reasons, but that's not an | |
129 | * issue as it will have to complete before the next command is | |
130 | * executed, and a new time event means a new command. | |
131 | */ | |
b112889c | 132 | iwl_mvm_flush_tx_path(mvm, queues, false); |
8ca151b5 JB |
133 | } |
134 | ||
135 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
136 | { | |
8ca151b5 JB |
137 | /* |
138 | * Of course, our status bit is just as racy as mac80211, so in | |
139 | * addition, fire off the work struct which will drop all frames | |
140 | * from the hardware queues that made it through the race. First | |
141 | * it will of course synchronize the TX path to make sure that | |
142 | * any *new* TX will be rejected. | |
143 | */ | |
144 | schedule_work(&mvm->roc_done_wk); | |
145 | } | |
146 | ||
7f0a7c67 AO |
147 | static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
148 | { | |
149 | struct ieee80211_vif *csa_vif; | |
150 | ||
151 | rcu_read_lock(); | |
152 | ||
153 | csa_vif = rcu_dereference(mvm->csa_vif); | |
154 | if (!csa_vif || !csa_vif->csa_active) | |
155 | goto out_unlock; | |
156 | ||
157 | IWL_DEBUG_TE(mvm, "CSA NOA started\n"); | |
158 | ||
159 | /* | |
160 | * CSA NoA is started but we still have beacons to | |
161 | * transmit on the current channel. | |
162 | * So we just do nothing here and the switch | |
163 | * will be performed on the last TBTT. | |
164 | */ | |
165 | if (!ieee80211_csa_is_complete(csa_vif)) { | |
166 | IWL_WARN(mvm, "CSA NOA started too early\n"); | |
167 | goto out_unlock; | |
168 | } | |
169 | ||
170 | ieee80211_csa_finish(csa_vif); | |
171 | ||
172 | rcu_read_unlock(); | |
173 | ||
174 | RCU_INIT_POINTER(mvm->csa_vif, NULL); | |
175 | ||
176 | return; | |
177 | ||
178 | out_unlock: | |
179 | rcu_read_unlock(); | |
180 | } | |
181 | ||
05739794 JB |
182 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
183 | struct ieee80211_vif *vif, | |
184 | const char *errmsg) | |
185 | { | |
186 | if (vif->type != NL80211_IFTYPE_STATION) | |
187 | return false; | |
188 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
189 | return false; | |
190 | if (errmsg) | |
191 | IWL_ERR(mvm, "%s\n", errmsg); | |
31755207 EG |
192 | |
193 | iwl_mvm_connection_loss(mvm, vif, errmsg); | |
05739794 JB |
194 | return true; |
195 | } | |
196 | ||
dc88b4ba LC |
197 | static void |
198 | iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, | |
199 | struct iwl_mvm_time_event_data *te_data, | |
200 | struct iwl_time_event_notif *notif) | |
201 | { | |
81d62d5a JB |
202 | struct ieee80211_vif *vif = te_data->vif; |
203 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
204 | ||
205 | if (!notif->status) | |
dc88b4ba | 206 | IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); |
dc88b4ba LC |
207 | |
208 | switch (te_data->vif->type) { | |
209 | case NL80211_IFTYPE_AP: | |
81d62d5a JB |
210 | if (!notif->status) |
211 | mvmvif->csa_failed = true; | |
dc88b4ba LC |
212 | iwl_mvm_csa_noa_start(mvm); |
213 | break; | |
214 | case NL80211_IFTYPE_STATION: | |
81d62d5a | 215 | if (!notif->status) { |
31755207 EG |
216 | iwl_mvm_connection_loss(mvm, vif, |
217 | "CSA TE failed to start"); | |
81d62d5a JB |
218 | break; |
219 | } | |
dc88b4ba | 220 | iwl_mvm_csa_client_absent(mvm, te_data->vif); |
622e3f9b | 221 | ieee80211_chswitch_done(te_data->vif, true); |
dc88b4ba LC |
222 | break; |
223 | default: | |
224 | /* should never happen */ | |
225 | WARN_ON_ONCE(1); | |
226 | break; | |
227 | } | |
228 | ||
229 | /* we don't need it anymore */ | |
230 | iwl_mvm_te_clear_data(mvm, te_data); | |
231 | } | |
232 | ||
874c174e EG |
233 | static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, |
234 | struct iwl_time_event_notif *notif, | |
235 | struct iwl_mvm_time_event_data *te_data) | |
236 | { | |
237 | struct iwl_fw_dbg_trigger_tlv *trig; | |
238 | struct iwl_fw_dbg_trigger_time_event *te_trig; | |
239 | int i; | |
240 | ||
241 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT)) | |
242 | return; | |
243 | ||
244 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT); | |
245 | te_trig = (void *)trig->data; | |
246 | ||
247 | if (!iwl_fw_dbg_trigger_check_stop(mvm, te_data->vif, trig)) | |
248 | return; | |
249 | ||
250 | for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { | |
251 | u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); | |
252 | u32 trig_action_bitmap = | |
253 | le32_to_cpu(te_trig->time_events[i].action_bitmap); | |
254 | u32 trig_status_bitmap = | |
255 | le32_to_cpu(te_trig->time_events[i].status_bitmap); | |
256 | ||
257 | if (trig_te_id != te_data->id || | |
258 | !(trig_action_bitmap & le32_to_cpu(notif->action)) || | |
259 | !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) | |
260 | continue; | |
261 | ||
262 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
263 | "Time event %d Action 0x%x received status: %d", | |
264 | te_data->id, | |
265 | le32_to_cpu(notif->action), | |
266 | le32_to_cpu(notif->status)); | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
8ca151b5 JB |
271 | /* |
272 | * Handles a FW notification for an event that is known to the driver. | |
273 | * | |
274 | * @mvm: the mvm component | |
275 | * @te_data: the time event data | |
276 | * @notif: the notification data corresponding the time event data. | |
277 | */ | |
278 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
279 | struct iwl_mvm_time_event_data *te_data, | |
280 | struct iwl_time_event_notif *notif) | |
281 | { | |
282 | lockdep_assert_held(&mvm->time_event_lock); | |
283 | ||
284 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
285 | le32_to_cpu(notif->unique_id), | |
286 | le32_to_cpu(notif->action)); | |
287 | ||
874c174e EG |
288 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
289 | ||
8ca151b5 JB |
290 | /* |
291 | * The FW sends the start/end time event notifications even for events | |
292 | * that it fails to schedule. This is indicated in the status field of | |
293 | * the notification. This happens in cases that the scheduler cannot | |
294 | * find a schedule that can handle the event (for example requesting a | |
295 | * P2P Device discoveribility, while there are other higher priority | |
296 | * events in the system). | |
297 | */ | |
9fc3fe96 | 298 | if (!le32_to_cpu(notif->status)) { |
bcd535eb JB |
299 | const char *msg; |
300 | ||
301 | if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) | |
302 | msg = "Time Event start notification failure"; | |
303 | else | |
304 | msg = "Time Event end notification failure"; | |
305 | ||
306 | IWL_DEBUG_TE(mvm, "%s\n", msg); | |
307 | ||
308 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { | |
05739794 JB |
309 | iwl_mvm_te_clear_data(mvm, te_data); |
310 | return; | |
311 | } | |
312 | } | |
8ca151b5 | 313 | |
f8f03c3e | 314 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
315 | IWL_DEBUG_TE(mvm, |
316 | "TE ended - current time %lu, estimated end %lu\n", | |
317 | jiffies, te_data->end_jiffies); | |
318 | ||
bca13904 JB |
319 | switch (te_data->vif->type) { |
320 | case NL80211_IFTYPE_P2P_DEVICE: | |
8ca151b5 JB |
321 | ieee80211_remain_on_channel_expired(mvm->hw); |
322 | iwl_mvm_roc_finished(mvm); | |
bca13904 JB |
323 | break; |
324 | case NL80211_IFTYPE_STATION: | |
325 | /* | |
326 | * By now, we should have finished association | |
327 | * and know the dtim period. | |
328 | */ | |
329 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, | |
330 | "No association and the time event is over already..."); | |
331 | break; | |
332 | default: | |
333 | break; | |
8ca151b5 JB |
334 | } |
335 | ||
8ca151b5 | 336 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 337 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 338 | te_data->running = true; |
e7f1935c | 339 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
340 | |
341 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
342 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 343 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 | 344 | ieee80211_ready_on_channel(mvm->hw); |
dc88b4ba LC |
345 | } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
346 | iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); | |
8ca151b5 JB |
347 | } |
348 | } else { | |
349 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
350 | } | |
351 | } | |
352 | ||
b112889c AM |
353 | /* |
354 | * Handle A Aux ROC time event | |
355 | */ | |
356 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
357 | struct iwl_time_event_notif *notif) | |
358 | { | |
359 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
360 | bool aux_roc_te = false; | |
361 | ||
362 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
363 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
364 | aux_roc_te = true; | |
365 | break; | |
366 | } | |
367 | } | |
368 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
369 | return -EINVAL; | |
370 | ||
874c174e EG |
371 | iwl_mvm_te_check_trigger(mvm, notif, te_data); |
372 | ||
b112889c AM |
373 | if (!le32_to_cpu(notif->status)) { |
374 | IWL_DEBUG_TE(mvm, | |
375 | "ERROR: Aux ROC Time Event %s notification failure\n", | |
376 | (le32_to_cpu(notif->action) & | |
377 | TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
381 | IWL_DEBUG_TE(mvm, | |
382 | "Aux ROC time event notification - UID = 0x%x action %d\n", | |
383 | le32_to_cpu(notif->unique_id), | |
384 | le32_to_cpu(notif->action)); | |
385 | ||
386 | if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
387 | /* End TE, notify mac80211 */ | |
388 | ieee80211_remain_on_channel_expired(mvm->hw); | |
389 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
390 | list_del(&te_data->list); /* remove from list */ | |
391 | te_data->running = false; | |
392 | te_data->vif = NULL; | |
393 | te_data->uid = 0; | |
a6cc5163 | 394 | te_data->id = TE_MAX; |
b112889c | 395 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
b112889c AM |
396 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
397 | te_data->running = true; | |
c779273b | 398 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC_AUX); |
b112889c AM |
399 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ |
400 | } else { | |
401 | IWL_DEBUG_TE(mvm, | |
402 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
403 | le32_to_cpu(notif->action)); | |
404 | return -EINVAL; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
8ca151b5 JB |
410 | /* |
411 | * The Rx handler for time event notifications | |
412 | */ | |
413 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
414 | struct iwl_rx_cmd_buffer *rxb, | |
415 | struct iwl_device_cmd *cmd) | |
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 JB |
435 | spin_unlock_bh(&mvm->time_event_lock); |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
d20d37bc LK |
440 | static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
441 | struct iwl_rx_packet *pkt, void *data) | |
442 | { | |
443 | struct iwl_mvm *mvm = | |
444 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
445 | struct iwl_mvm_time_event_data *te_data = data; | |
446 | struct iwl_time_event_notif *resp; | |
447 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
448 | ||
449 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) | |
450 | return true; | |
451 | ||
452 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
453 | IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); | |
454 | return true; | |
455 | } | |
456 | ||
457 | resp = (void *)pkt->data; | |
458 | ||
459 | /* te_data->uid is already set in the TIME_EVENT_CMD response */ | |
460 | if (le32_to_cpu(resp->unique_id) != te_data->uid) | |
461 | return false; | |
462 | ||
463 | IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", | |
464 | te_data->uid); | |
465 | if (!resp->status) | |
466 | IWL_ERR(mvm, | |
467 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
468 | ||
469 | return true; | |
470 | } | |
471 | ||
ffdf968d JB |
472 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
473 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
474 | { |
475 | struct iwl_mvm *mvm = | |
476 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
477 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 478 | struct iwl_time_event_resp *resp; |
65b30348 | 479 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 480 | |
ffdf968d JB |
481 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
482 | return true; | |
8ca151b5 | 483 | |
65b30348 | 484 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
485 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
486 | return true; | |
487 | } | |
8ca151b5 | 488 | |
ffdf968d | 489 | resp = (void *)pkt->data; |
e3722822 JB |
490 | |
491 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
492 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
493 | return false; | |
494 | ||
ffdf968d JB |
495 | te_data->uid = le32_to_cpu(resp->unique_id); |
496 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
497 | te_data->uid); | |
498 | return true; | |
499 | } | |
8ca151b5 | 500 | |
ffdf968d JB |
501 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
502 | struct ieee80211_vif *vif, | |
503 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 504 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d JB |
505 | { |
506 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
507 | struct iwl_notification_wait wait_time_event; | |
508 | int ret; | |
509 | ||
510 | lockdep_assert_held(&mvm->mutex); | |
511 | ||
93630dc3 JB |
512 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
513 | le32_to_cpu(te_cmd->duration)); | |
514 | ||
ffdf968d JB |
515 | spin_lock_bh(&mvm->time_event_lock); |
516 | if (WARN_ON(te_data->id != TE_MAX)) { | |
517 | spin_unlock_bh(&mvm->time_event_lock); | |
518 | return -EIO; | |
519 | } | |
520 | te_data->vif = vif; | |
521 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
522 | te_data->id = le32_to_cpu(te_cmd->id); | |
523 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
524 | spin_unlock_bh(&mvm->time_event_lock); | |
525 | ||
526 | /* | |
527 | * Use a notification wait, which really just processes the | |
528 | * command response and doesn't wait for anything, in order | |
529 | * to be able to process the response and get the UID inside | |
530 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
531 | * stores the buffer and then wakes up this thread, by which | |
532 | * time another notification (that the time event started) | |
533 | * might already be processed unsuccessfully. | |
534 | */ | |
535 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
536 | time_event_response, | |
537 | ARRAY_SIZE(time_event_response), | |
538 | iwl_mvm_time_event_response, te_data); | |
539 | ||
a1022927 | 540 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 541 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
542 | if (ret) { |
543 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
544 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
545 | goto out_clear_te; | |
546 | } | |
8ca151b5 | 547 | |
ffdf968d JB |
548 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
549 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
550 | /* should never fail */ | |
551 | WARN_ON_ONCE(ret); | |
552 | ||
553 | if (ret) { | |
554 | out_clear_te: | |
555 | spin_lock_bh(&mvm->time_event_lock); | |
556 | iwl_mvm_te_clear_data(mvm, te_data); | |
557 | spin_unlock_bh(&mvm->time_event_lock); | |
558 | } | |
559 | return ret; | |
8ca151b5 JB |
560 | } |
561 | ||
562 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
563 | struct ieee80211_vif *vif, | |
016d27e1 | 564 | u32 duration, u32 min_duration, |
d20d37bc | 565 | u32 max_delay, bool wait_for_notif) |
8ca151b5 JB |
566 | { |
567 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
568 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
d20d37bc LK |
569 | const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
570 | struct iwl_notification_wait wait_te_notif; | |
a373f67c | 571 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
572 | |
573 | lockdep_assert_held(&mvm->mutex); | |
574 | ||
575 | if (te_data->running && | |
e7f1935c | 576 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
577 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
578 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
579 | return; | |
580 | } | |
581 | ||
582 | if (te_data->running) { | |
583 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
584 | te_data->uid, | |
585 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
586 | /* | |
587 | * we don't have enough time | |
588 | * cancel the current TE and issue a new one | |
589 | * Of course it would be better to remove the old one only | |
590 | * when the new one is added, but we don't care if we are off | |
591 | * channel for a bit. All we need to do, is not to return | |
592 | * before we actually begin to be on the channel. | |
593 | */ | |
594 | iwl_mvm_stop_session_protection(mvm, vif); | |
595 | } | |
596 | ||
8ca151b5 JB |
597 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
598 | time_cmd.id_and_color = | |
599 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
600 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
601 | ||
602 | time_cmd.apply_time = | |
603 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 604 | |
f8f03c3e | 605 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 606 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
607 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
608 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 609 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
610 | time_cmd.repeat = 1; |
611 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
612 | TE_V2_NOTIF_HOST_EVENT_END | |
613 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 614 | |
d20d37bc LK |
615 | if (!wait_for_notif) { |
616 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
617 | return; | |
618 | } | |
619 | ||
620 | /* | |
621 | * Create notification_wait for the TIME_EVENT_NOTIFICATION to use | |
622 | * right after we send the time event | |
623 | */ | |
624 | iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, | |
625 | te_notif_response, | |
626 | ARRAY_SIZE(te_notif_response), | |
627 | iwl_mvm_te_notif, te_data); | |
628 | ||
629 | /* If TE was sent OK - wait for the notification that started */ | |
630 | if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { | |
631 | IWL_ERR(mvm, "Failed to add TE to protect session\n"); | |
632 | iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); | |
633 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, | |
634 | TU_TO_JIFFIES(max_delay))) { | |
635 | IWL_ERR(mvm, "Failed to protect session until TE\n"); | |
636 | } | |
8ca151b5 JB |
637 | } |
638 | ||
bf5da87f MG |
639 | static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
640 | struct iwl_mvm_time_event_data *te_data, | |
641 | u32 *uid) | |
8ca151b5 | 642 | { |
bf5da87f | 643 | u32 id; |
8ca151b5 JB |
644 | |
645 | /* | |
646 | * It is possible that by the time we got to this point the time | |
647 | * event was already removed. | |
648 | */ | |
649 | spin_lock_bh(&mvm->time_event_lock); | |
650 | ||
651 | /* Save time event uid before clearing its data */ | |
bf5da87f | 652 | *uid = te_data->uid; |
8ca151b5 JB |
653 | id = te_data->id; |
654 | ||
655 | /* | |
656 | * The clear_data function handles time events that were already removed | |
657 | */ | |
658 | iwl_mvm_te_clear_data(mvm, te_data); | |
659 | spin_unlock_bh(&mvm->time_event_lock); | |
660 | ||
661 | /* | |
662 | * It is possible that by the time we try to remove it, the time event | |
663 | * has already ended and removed. In such a case there is no need to | |
664 | * send a removal command. | |
665 | */ | |
666 | if (id == TE_MAX) { | |
bf5da87f MG |
667 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
668 | return false; | |
8ca151b5 JB |
669 | } |
670 | ||
bf5da87f MG |
671 | return true; |
672 | } | |
673 | ||
674 | /* | |
675 | * Explicit request to remove a aux roc time event. The removal of a time | |
676 | * event needs to be synchronized with the flow of a time event's end | |
677 | * notification, which also removes the time event from the op mode | |
678 | * data structures. | |
679 | */ | |
680 | static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, | |
681 | struct iwl_mvm_vif *mvmvif, | |
682 | struct iwl_mvm_time_event_data *te_data) | |
683 | { | |
684 | struct iwl_hs20_roc_req aux_cmd = {}; | |
685 | u32 uid; | |
686 | int ret; | |
687 | ||
688 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
689 | return; | |
690 | ||
691 | aux_cmd.event_unique_id = cpu_to_le32(uid); | |
692 | aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
693 | aux_cmd.id_and_color = | |
694 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
695 | IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", | |
696 | le32_to_cpu(aux_cmd.event_unique_id)); | |
697 | ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, | |
698 | sizeof(aux_cmd), &aux_cmd); | |
699 | ||
700 | if (WARN_ON(ret)) | |
701 | return; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Explicit request to remove a time event. The removal of a time event needs to | |
706 | * be synchronized with the flow of a time event's end notification, which also | |
707 | * removes the time event from the op mode data structures. | |
708 | */ | |
709 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
710 | struct iwl_mvm_vif *mvmvif, | |
711 | struct iwl_mvm_time_event_data *te_data) | |
712 | { | |
713 | struct iwl_time_event_cmd time_cmd = {}; | |
714 | u32 uid; | |
715 | int ret; | |
716 | ||
717 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
718 | return; | |
719 | ||
8ca151b5 JB |
720 | /* When we remove a TE, the UID is to be set in the id field */ |
721 | time_cmd.id = cpu_to_le32(uid); | |
722 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
723 | time_cmd.id_and_color = | |
724 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
725 | ||
726 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 727 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 728 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
729 | if (WARN_ON(ret)) |
730 | return; | |
731 | } | |
732 | ||
733 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
734 | struct ieee80211_vif *vif) | |
735 | { | |
736 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
737 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
738 | ||
739 | lockdep_assert_held(&mvm->mutex); | |
740 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
741 | } | |
742 | ||
8ca151b5 | 743 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 744 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
745 | { |
746 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
747 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 748 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
749 | |
750 | lockdep_assert_held(&mvm->mutex); | |
751 | if (te_data->running) { | |
752 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
753 | return -EBUSY; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Flush the done work, just in case it's still pending, so that | |
758 | * the work it does can complete and we can accept new frames. | |
759 | */ | |
760 | flush_work(&mvm->roc_done_wk); | |
761 | ||
8ca151b5 JB |
762 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
763 | time_cmd.id_and_color = | |
764 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
765 | |
766 | switch (type) { | |
767 | case IEEE80211_ROC_TYPE_NORMAL: | |
768 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
769 | break; | |
770 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
771 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
772 | break; | |
773 | default: | |
774 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
775 | return -EINVAL; | |
776 | } | |
8ca151b5 JB |
777 | |
778 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
779 | time_cmd.interval = cpu_to_le32(1); |
780 | ||
781 | /* | |
e635c797 | 782 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 783 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
784 | * scheduled. To improve the chances of it being scheduled, allow them |
785 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 786 | */ |
f8f03c3e | 787 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
788 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
789 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
790 | time_cmd.repeat = 1; |
791 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
792 | TE_V2_NOTIF_HOST_EVENT_END | |
793 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 794 | |
ffdf968d | 795 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
796 | } |
797 | ||
bf5da87f | 798 | void iwl_mvm_stop_roc(struct iwl_mvm *mvm) |
8ca151b5 JB |
799 | { |
800 | struct iwl_mvm_vif *mvmvif; | |
801 | struct iwl_mvm_time_event_data *te_data; | |
bf5da87f | 802 | bool is_p2p = false; |
8ca151b5 JB |
803 | |
804 | lockdep_assert_held(&mvm->mutex); | |
805 | ||
bf5da87f MG |
806 | mvmvif = NULL; |
807 | spin_lock_bh(&mvm->time_event_lock); | |
808 | ||
8ca151b5 JB |
809 | /* |
810 | * Iterate over the list of time events and find the time event that is | |
811 | * associated with a P2P_DEVICE interface. | |
812 | * This assumes that a P2P_DEVICE interface can have only a single time | |
813 | * event at any given time and this time event coresponds to a ROC | |
814 | * request | |
815 | */ | |
8ca151b5 | 816 | list_for_each_entry(te_data, &mvm->time_event_list, list) { |
833d9b97 | 817 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
8ca151b5 | 818 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
bf5da87f MG |
819 | is_p2p = true; |
820 | goto remove_te; | |
821 | } | |
822 | } | |
823 | ||
824 | /* | |
825 | * Iterate over the list of aux roc time events and find the time | |
826 | * event that is associated with a BSS interface. | |
827 | * This assumes that a BSS interface can have only a single time | |
0d365ae5 | 828 | * event at any given time and this time event corresponds to a ROC |
bf5da87f MG |
829 | * request |
830 | */ | |
831 | list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) { | |
833d9b97 AO |
832 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
833 | goto remove_te; | |
8ca151b5 | 834 | } |
bf5da87f MG |
835 | |
836 | remove_te: | |
8ca151b5 JB |
837 | spin_unlock_bh(&mvm->time_event_lock); |
838 | ||
839 | if (!mvmvif) { | |
bf5da87f | 840 | IWL_WARN(mvm, "No remain on channel event\n"); |
8ca151b5 JB |
841 | return; |
842 | } | |
843 | ||
bf5da87f MG |
844 | if (is_p2p) |
845 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
846 | else | |
847 | iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); | |
8ca151b5 JB |
848 | |
849 | iwl_mvm_roc_finished(mvm); | |
850 | } | |
7f0a7c67 | 851 | |
f991e17b LC |
852 | int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
853 | struct ieee80211_vif *vif, | |
854 | u32 duration, u32 apply_time) | |
7f0a7c67 AO |
855 | { |
856 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
857 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
858 | struct iwl_time_event_cmd time_cmd = {}; | |
859 | ||
860 | lockdep_assert_held(&mvm->mutex); | |
861 | ||
862 | if (te_data->running) { | |
f991e17b | 863 | IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); |
7f0a7c67 AO |
864 | return -EBUSY; |
865 | } | |
866 | ||
867 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
868 | time_cmd.id_and_color = | |
869 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
f991e17b | 870 | time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
7f0a7c67 AO |
871 | time_cmd.apply_time = cpu_to_le32(apply_time); |
872 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
873 | time_cmd.duration = cpu_to_le32(duration); | |
874 | time_cmd.repeat = 1; | |
875 | time_cmd.interval = cpu_to_le32(1); | |
876 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
877 | TE_V2_ABSENCE); | |
878 | ||
879 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
880 | } |