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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. |
8b4139dc | 9 | * Copyright(c) 2013 - 2014 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. |
8b4139dc | 35 | * Copyright(c) 2013 - 2014 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 | */ | |
111 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) | |
112 | queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE); | |
113 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) | |
114 | queues |= BIT(mvm->aux_queue); | |
115 | ||
116 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); | |
8ca151b5 JB |
117 | |
118 | synchronize_net(); | |
119 | ||
120 | /* | |
121 | * Flush the offchannel queue -- this is called when the time | |
122 | * event finishes or is cancelled, so that frames queued for it | |
123 | * won't get stuck on the queue and be transmitted in the next | |
124 | * time event. | |
125 | * We have to send the command asynchronously since this cannot | |
126 | * be under the mutex for locking reasons, but that's not an | |
127 | * issue as it will have to complete before the next command is | |
128 | * executed, and a new time event means a new command. | |
129 | */ | |
b112889c | 130 | iwl_mvm_flush_tx_path(mvm, queues, false); |
8ca151b5 JB |
131 | } |
132 | ||
133 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
134 | { | |
8ca151b5 JB |
135 | /* |
136 | * Of course, our status bit is just as racy as mac80211, so in | |
137 | * addition, fire off the work struct which will drop all frames | |
138 | * from the hardware queues that made it through the race. First | |
139 | * it will of course synchronize the TX path to make sure that | |
140 | * any *new* TX will be rejected. | |
141 | */ | |
142 | schedule_work(&mvm->roc_done_wk); | |
143 | } | |
144 | ||
7f0a7c67 AO |
145 | static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
146 | { | |
147 | struct ieee80211_vif *csa_vif; | |
148 | ||
149 | rcu_read_lock(); | |
150 | ||
151 | csa_vif = rcu_dereference(mvm->csa_vif); | |
152 | if (!csa_vif || !csa_vif->csa_active) | |
153 | goto out_unlock; | |
154 | ||
155 | IWL_DEBUG_TE(mvm, "CSA NOA started\n"); | |
156 | ||
157 | /* | |
158 | * CSA NoA is started but we still have beacons to | |
159 | * transmit on the current channel. | |
160 | * So we just do nothing here and the switch | |
161 | * will be performed on the last TBTT. | |
162 | */ | |
163 | if (!ieee80211_csa_is_complete(csa_vif)) { | |
164 | IWL_WARN(mvm, "CSA NOA started too early\n"); | |
165 | goto out_unlock; | |
166 | } | |
167 | ||
168 | ieee80211_csa_finish(csa_vif); | |
169 | ||
170 | rcu_read_unlock(); | |
171 | ||
172 | RCU_INIT_POINTER(mvm->csa_vif, NULL); | |
173 | ||
174 | return; | |
175 | ||
176 | out_unlock: | |
177 | rcu_read_unlock(); | |
178 | } | |
179 | ||
05739794 JB |
180 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
181 | struct ieee80211_vif *vif, | |
182 | const char *errmsg) | |
183 | { | |
184 | if (vif->type != NL80211_IFTYPE_STATION) | |
185 | return false; | |
186 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
187 | return false; | |
188 | if (errmsg) | |
189 | IWL_ERR(mvm, "%s\n", errmsg); | |
190 | ieee80211_connection_loss(vif); | |
191 | return true; | |
192 | } | |
193 | ||
dc88b4ba LC |
194 | static void |
195 | iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, | |
196 | struct iwl_mvm_time_event_data *te_data, | |
197 | struct iwl_time_event_notif *notif) | |
198 | { | |
199 | if (!le32_to_cpu(notif->status)) { | |
200 | IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); | |
0c6505c6 | 201 | iwl_mvm_te_clear_data(mvm, te_data); |
dc88b4ba LC |
202 | return; |
203 | } | |
204 | ||
205 | switch (te_data->vif->type) { | |
206 | case NL80211_IFTYPE_AP: | |
207 | iwl_mvm_csa_noa_start(mvm); | |
208 | break; | |
209 | case NL80211_IFTYPE_STATION: | |
210 | iwl_mvm_csa_client_absent(mvm, te_data->vif); | |
622e3f9b | 211 | ieee80211_chswitch_done(te_data->vif, true); |
dc88b4ba LC |
212 | break; |
213 | default: | |
214 | /* should never happen */ | |
215 | WARN_ON_ONCE(1); | |
216 | break; | |
217 | } | |
218 | ||
219 | /* we don't need it anymore */ | |
220 | iwl_mvm_te_clear_data(mvm, te_data); | |
221 | } | |
222 | ||
8ca151b5 JB |
223 | /* |
224 | * Handles a FW notification for an event that is known to the driver. | |
225 | * | |
226 | * @mvm: the mvm component | |
227 | * @te_data: the time event data | |
228 | * @notif: the notification data corresponding the time event data. | |
229 | */ | |
230 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
231 | struct iwl_mvm_time_event_data *te_data, | |
232 | struct iwl_time_event_notif *notif) | |
233 | { | |
234 | lockdep_assert_held(&mvm->time_event_lock); | |
235 | ||
236 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
237 | le32_to_cpu(notif->unique_id), | |
238 | le32_to_cpu(notif->action)); | |
239 | ||
240 | /* | |
241 | * The FW sends the start/end time event notifications even for events | |
242 | * that it fails to schedule. This is indicated in the status field of | |
243 | * the notification. This happens in cases that the scheduler cannot | |
244 | * find a schedule that can handle the event (for example requesting a | |
245 | * P2P Device discoveribility, while there are other higher priority | |
246 | * events in the system). | |
247 | */ | |
9fc3fe96 EG |
248 | if (!le32_to_cpu(notif->status)) { |
249 | bool start = le32_to_cpu(notif->action) & | |
250 | TE_V2_NOTIF_HOST_EVENT_START; | |
251 | IWL_WARN(mvm, "Time Event %s notification failure\n", | |
252 | start ? "start" : "end"); | |
05739794 JB |
253 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { |
254 | iwl_mvm_te_clear_data(mvm, te_data); | |
255 | return; | |
256 | } | |
257 | } | |
8ca151b5 | 258 | |
f8f03c3e | 259 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
260 | IWL_DEBUG_TE(mvm, |
261 | "TE ended - current time %lu, estimated end %lu\n", | |
262 | jiffies, te_data->end_jiffies); | |
263 | ||
264 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
265 | ieee80211_remain_on_channel_expired(mvm->hw); | |
266 | iwl_mvm_roc_finished(mvm); | |
267 | } | |
268 | ||
269 | /* | |
270 | * By now, we should have finished association | |
271 | * and know the dtim period. | |
272 | */ | |
05739794 | 273 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
2e515bf0 | 274 | "No association and the time event is over already..."); |
8ca151b5 | 275 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 276 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 277 | te_data->running = true; |
e7f1935c | 278 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
279 | |
280 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
281 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 282 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 | 283 | ieee80211_ready_on_channel(mvm->hw); |
dc88b4ba LC |
284 | } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
285 | iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); | |
8ca151b5 JB |
286 | } |
287 | } else { | |
288 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
289 | } | |
290 | } | |
291 | ||
b112889c AM |
292 | /* |
293 | * Handle A Aux ROC time event | |
294 | */ | |
295 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
296 | struct iwl_time_event_notif *notif) | |
297 | { | |
298 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
299 | bool aux_roc_te = false; | |
300 | ||
301 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
302 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
303 | aux_roc_te = true; | |
304 | break; | |
305 | } | |
306 | } | |
307 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
308 | return -EINVAL; | |
309 | ||
310 | if (!le32_to_cpu(notif->status)) { | |
311 | IWL_DEBUG_TE(mvm, | |
312 | "ERROR: Aux ROC Time Event %s notification failure\n", | |
313 | (le32_to_cpu(notif->action) & | |
314 | TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
318 | IWL_DEBUG_TE(mvm, | |
319 | "Aux ROC time event notification - UID = 0x%x action %d\n", | |
320 | le32_to_cpu(notif->unique_id), | |
321 | le32_to_cpu(notif->action)); | |
322 | ||
323 | if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
324 | /* End TE, notify mac80211 */ | |
325 | ieee80211_remain_on_channel_expired(mvm->hw); | |
326 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
327 | list_del(&te_data->list); /* remove from list */ | |
328 | te_data->running = false; | |
329 | te_data->vif = NULL; | |
330 | te_data->uid = 0; | |
a6cc5163 | 331 | te_data->id = TE_MAX; |
b112889c | 332 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
b112889c AM |
333 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
334 | te_data->running = true; | |
335 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ | |
336 | } else { | |
337 | IWL_DEBUG_TE(mvm, | |
338 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
339 | le32_to_cpu(notif->action)); | |
340 | return -EINVAL; | |
341 | } | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
8ca151b5 JB |
346 | /* |
347 | * The Rx handler for time event notifications | |
348 | */ | |
349 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
350 | struct iwl_rx_cmd_buffer *rxb, | |
351 | struct iwl_device_cmd *cmd) | |
352 | { | |
353 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
354 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
355 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
356 | ||
357 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
358 | le32_to_cpu(notif->unique_id), | |
359 | le32_to_cpu(notif->action)); | |
360 | ||
361 | spin_lock_bh(&mvm->time_event_lock); | |
b112889c AM |
362 | /* This time event is triggered for Aux ROC request */ |
363 | if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) | |
364 | goto unlock; | |
365 | ||
8ca151b5 JB |
366 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
367 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
368 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
369 | } | |
b112889c | 370 | unlock: |
8ca151b5 JB |
371 | spin_unlock_bh(&mvm->time_event_lock); |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
d20d37bc LK |
376 | static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
377 | struct iwl_rx_packet *pkt, void *data) | |
378 | { | |
379 | struct iwl_mvm *mvm = | |
380 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
381 | struct iwl_mvm_time_event_data *te_data = data; | |
382 | struct iwl_time_event_notif *resp; | |
383 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
384 | ||
385 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) | |
386 | return true; | |
387 | ||
388 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
389 | IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); | |
390 | return true; | |
391 | } | |
392 | ||
393 | resp = (void *)pkt->data; | |
394 | ||
395 | /* te_data->uid is already set in the TIME_EVENT_CMD response */ | |
396 | if (le32_to_cpu(resp->unique_id) != te_data->uid) | |
397 | return false; | |
398 | ||
399 | IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", | |
400 | te_data->uid); | |
401 | if (!resp->status) | |
402 | IWL_ERR(mvm, | |
403 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
404 | ||
405 | return true; | |
406 | } | |
407 | ||
ffdf968d JB |
408 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
409 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
410 | { |
411 | struct iwl_mvm *mvm = | |
412 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
413 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 414 | struct iwl_time_event_resp *resp; |
65b30348 | 415 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 416 | |
ffdf968d JB |
417 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
418 | return true; | |
8ca151b5 | 419 | |
65b30348 | 420 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
421 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
422 | return true; | |
423 | } | |
8ca151b5 | 424 | |
ffdf968d | 425 | resp = (void *)pkt->data; |
e3722822 JB |
426 | |
427 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
428 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
429 | return false; | |
430 | ||
ffdf968d JB |
431 | te_data->uid = le32_to_cpu(resp->unique_id); |
432 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
433 | te_data->uid); | |
434 | return true; | |
435 | } | |
8ca151b5 | 436 | |
ffdf968d JB |
437 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
438 | struct ieee80211_vif *vif, | |
439 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 440 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d JB |
441 | { |
442 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
443 | struct iwl_notification_wait wait_time_event; | |
444 | int ret; | |
445 | ||
446 | lockdep_assert_held(&mvm->mutex); | |
447 | ||
93630dc3 JB |
448 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
449 | le32_to_cpu(te_cmd->duration)); | |
450 | ||
ffdf968d JB |
451 | spin_lock_bh(&mvm->time_event_lock); |
452 | if (WARN_ON(te_data->id != TE_MAX)) { | |
453 | spin_unlock_bh(&mvm->time_event_lock); | |
454 | return -EIO; | |
455 | } | |
456 | te_data->vif = vif; | |
457 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
458 | te_data->id = le32_to_cpu(te_cmd->id); | |
459 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
460 | spin_unlock_bh(&mvm->time_event_lock); | |
461 | ||
462 | /* | |
463 | * Use a notification wait, which really just processes the | |
464 | * command response and doesn't wait for anything, in order | |
465 | * to be able to process the response and get the UID inside | |
466 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
467 | * stores the buffer and then wakes up this thread, by which | |
468 | * time another notification (that the time event started) | |
469 | * might already be processed unsuccessfully. | |
470 | */ | |
471 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
472 | time_event_response, | |
473 | ARRAY_SIZE(time_event_response), | |
474 | iwl_mvm_time_event_response, te_data); | |
475 | ||
a1022927 | 476 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 477 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
478 | if (ret) { |
479 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
480 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
481 | goto out_clear_te; | |
482 | } | |
8ca151b5 | 483 | |
ffdf968d JB |
484 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
485 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
486 | /* should never fail */ | |
487 | WARN_ON_ONCE(ret); | |
488 | ||
489 | if (ret) { | |
490 | out_clear_te: | |
491 | spin_lock_bh(&mvm->time_event_lock); | |
492 | iwl_mvm_te_clear_data(mvm, te_data); | |
493 | spin_unlock_bh(&mvm->time_event_lock); | |
494 | } | |
495 | return ret; | |
8ca151b5 JB |
496 | } |
497 | ||
498 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
499 | struct ieee80211_vif *vif, | |
016d27e1 | 500 | u32 duration, u32 min_duration, |
d20d37bc | 501 | u32 max_delay, bool wait_for_notif) |
8ca151b5 JB |
502 | { |
503 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
504 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
d20d37bc LK |
505 | const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
506 | struct iwl_notification_wait wait_te_notif; | |
a373f67c | 507 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
508 | |
509 | lockdep_assert_held(&mvm->mutex); | |
510 | ||
511 | if (te_data->running && | |
e7f1935c | 512 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
513 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
514 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
515 | return; | |
516 | } | |
517 | ||
518 | if (te_data->running) { | |
519 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
520 | te_data->uid, | |
521 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
522 | /* | |
523 | * we don't have enough time | |
524 | * cancel the current TE and issue a new one | |
525 | * Of course it would be better to remove the old one only | |
526 | * when the new one is added, but we don't care if we are off | |
527 | * channel for a bit. All we need to do, is not to return | |
528 | * before we actually begin to be on the channel. | |
529 | */ | |
530 | iwl_mvm_stop_session_protection(mvm, vif); | |
531 | } | |
532 | ||
8ca151b5 JB |
533 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
534 | time_cmd.id_and_color = | |
535 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
536 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
537 | ||
538 | time_cmd.apply_time = | |
539 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 540 | |
f8f03c3e | 541 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 542 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
543 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
544 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 545 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
546 | time_cmd.repeat = 1; |
547 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
548 | TE_V2_NOTIF_HOST_EVENT_END | |
549 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 550 | |
d20d37bc LK |
551 | if (!wait_for_notif) { |
552 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
553 | return; | |
554 | } | |
555 | ||
556 | /* | |
557 | * Create notification_wait for the TIME_EVENT_NOTIFICATION to use | |
558 | * right after we send the time event | |
559 | */ | |
560 | iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, | |
561 | te_notif_response, | |
562 | ARRAY_SIZE(te_notif_response), | |
563 | iwl_mvm_te_notif, te_data); | |
564 | ||
565 | /* If TE was sent OK - wait for the notification that started */ | |
566 | if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { | |
567 | IWL_ERR(mvm, "Failed to add TE to protect session\n"); | |
568 | iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); | |
569 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, | |
570 | TU_TO_JIFFIES(max_delay))) { | |
571 | IWL_ERR(mvm, "Failed to protect session until TE\n"); | |
572 | } | |
8ca151b5 JB |
573 | } |
574 | ||
bf5da87f MG |
575 | static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
576 | struct iwl_mvm_time_event_data *te_data, | |
577 | u32 *uid) | |
8ca151b5 | 578 | { |
bf5da87f | 579 | u32 id; |
8ca151b5 JB |
580 | |
581 | /* | |
582 | * It is possible that by the time we got to this point the time | |
583 | * event was already removed. | |
584 | */ | |
585 | spin_lock_bh(&mvm->time_event_lock); | |
586 | ||
587 | /* Save time event uid before clearing its data */ | |
bf5da87f | 588 | *uid = te_data->uid; |
8ca151b5 JB |
589 | id = te_data->id; |
590 | ||
591 | /* | |
592 | * The clear_data function handles time events that were already removed | |
593 | */ | |
594 | iwl_mvm_te_clear_data(mvm, te_data); | |
595 | spin_unlock_bh(&mvm->time_event_lock); | |
596 | ||
597 | /* | |
598 | * It is possible that by the time we try to remove it, the time event | |
599 | * has already ended and removed. In such a case there is no need to | |
600 | * send a removal command. | |
601 | */ | |
602 | if (id == TE_MAX) { | |
bf5da87f MG |
603 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
604 | return false; | |
8ca151b5 JB |
605 | } |
606 | ||
bf5da87f MG |
607 | return true; |
608 | } | |
609 | ||
610 | /* | |
611 | * Explicit request to remove a aux roc time event. The removal of a time | |
612 | * event needs to be synchronized with the flow of a time event's end | |
613 | * notification, which also removes the time event from the op mode | |
614 | * data structures. | |
615 | */ | |
616 | static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, | |
617 | struct iwl_mvm_vif *mvmvif, | |
618 | struct iwl_mvm_time_event_data *te_data) | |
619 | { | |
620 | struct iwl_hs20_roc_req aux_cmd = {}; | |
621 | u32 uid; | |
622 | int ret; | |
623 | ||
624 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
625 | return; | |
626 | ||
627 | aux_cmd.event_unique_id = cpu_to_le32(uid); | |
628 | aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
629 | aux_cmd.id_and_color = | |
630 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
631 | IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", | |
632 | le32_to_cpu(aux_cmd.event_unique_id)); | |
633 | ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, | |
634 | sizeof(aux_cmd), &aux_cmd); | |
635 | ||
636 | if (WARN_ON(ret)) | |
637 | return; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Explicit request to remove a time event. The removal of a time event needs to | |
642 | * be synchronized with the flow of a time event's end notification, which also | |
643 | * removes the time event from the op mode data structures. | |
644 | */ | |
645 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
646 | struct iwl_mvm_vif *mvmvif, | |
647 | struct iwl_mvm_time_event_data *te_data) | |
648 | { | |
649 | struct iwl_time_event_cmd time_cmd = {}; | |
650 | u32 uid; | |
651 | int ret; | |
652 | ||
653 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
654 | return; | |
655 | ||
8ca151b5 JB |
656 | /* When we remove a TE, the UID is to be set in the id field */ |
657 | time_cmd.id = cpu_to_le32(uid); | |
658 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
659 | time_cmd.id_and_color = | |
660 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
661 | ||
662 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 663 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 664 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
665 | if (WARN_ON(ret)) |
666 | return; | |
667 | } | |
668 | ||
669 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
670 | struct ieee80211_vif *vif) | |
671 | { | |
672 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
673 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
674 | ||
675 | lockdep_assert_held(&mvm->mutex); | |
676 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
677 | } | |
678 | ||
8ca151b5 | 679 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 680 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
681 | { |
682 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
683 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 684 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
685 | |
686 | lockdep_assert_held(&mvm->mutex); | |
687 | if (te_data->running) { | |
688 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
689 | return -EBUSY; | |
690 | } | |
691 | ||
692 | /* | |
693 | * Flush the done work, just in case it's still pending, so that | |
694 | * the work it does can complete and we can accept new frames. | |
695 | */ | |
696 | flush_work(&mvm->roc_done_wk); | |
697 | ||
8ca151b5 JB |
698 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
699 | time_cmd.id_and_color = | |
700 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
701 | |
702 | switch (type) { | |
703 | case IEEE80211_ROC_TYPE_NORMAL: | |
704 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
705 | break; | |
706 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
707 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
708 | break; | |
709 | default: | |
710 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
711 | return -EINVAL; | |
712 | } | |
8ca151b5 JB |
713 | |
714 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
715 | time_cmd.interval = cpu_to_le32(1); |
716 | ||
717 | /* | |
e635c797 | 718 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 719 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
720 | * scheduled. To improve the chances of it being scheduled, allow them |
721 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 722 | */ |
f8f03c3e | 723 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
724 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
725 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
726 | time_cmd.repeat = 1; |
727 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
728 | TE_V2_NOTIF_HOST_EVENT_END | |
729 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 730 | |
ffdf968d | 731 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
732 | } |
733 | ||
bf5da87f | 734 | void iwl_mvm_stop_roc(struct iwl_mvm *mvm) |
8ca151b5 JB |
735 | { |
736 | struct iwl_mvm_vif *mvmvif; | |
737 | struct iwl_mvm_time_event_data *te_data; | |
bf5da87f | 738 | bool is_p2p = false; |
8ca151b5 JB |
739 | |
740 | lockdep_assert_held(&mvm->mutex); | |
741 | ||
bf5da87f MG |
742 | mvmvif = NULL; |
743 | spin_lock_bh(&mvm->time_event_lock); | |
744 | ||
8ca151b5 JB |
745 | /* |
746 | * Iterate over the list of time events and find the time event that is | |
747 | * associated with a P2P_DEVICE interface. | |
748 | * This assumes that a P2P_DEVICE interface can have only a single time | |
749 | * event at any given time and this time event coresponds to a ROC | |
750 | * request | |
751 | */ | |
8ca151b5 | 752 | list_for_each_entry(te_data, &mvm->time_event_list, list) { |
833d9b97 | 753 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
8ca151b5 | 754 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
bf5da87f MG |
755 | is_p2p = true; |
756 | goto remove_te; | |
757 | } | |
758 | } | |
759 | ||
760 | /* | |
761 | * Iterate over the list of aux roc time events and find the time | |
762 | * event that is associated with a BSS interface. | |
763 | * This assumes that a BSS interface can have only a single time | |
764 | * event at any given time and this time event coresponds to a ROC | |
765 | * request | |
766 | */ | |
767 | list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) { | |
833d9b97 AO |
768 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
769 | goto remove_te; | |
8ca151b5 | 770 | } |
bf5da87f MG |
771 | |
772 | remove_te: | |
8ca151b5 JB |
773 | spin_unlock_bh(&mvm->time_event_lock); |
774 | ||
775 | if (!mvmvif) { | |
bf5da87f | 776 | IWL_WARN(mvm, "No remain on channel event\n"); |
8ca151b5 JB |
777 | return; |
778 | } | |
779 | ||
bf5da87f MG |
780 | if (is_p2p) |
781 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
782 | else | |
783 | iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); | |
8ca151b5 JB |
784 | |
785 | iwl_mvm_roc_finished(mvm); | |
786 | } | |
7f0a7c67 | 787 | |
f991e17b LC |
788 | int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
789 | struct ieee80211_vif *vif, | |
790 | u32 duration, u32 apply_time) | |
7f0a7c67 AO |
791 | { |
792 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
793 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
794 | struct iwl_time_event_cmd time_cmd = {}; | |
795 | ||
796 | lockdep_assert_held(&mvm->mutex); | |
797 | ||
798 | if (te_data->running) { | |
f991e17b | 799 | IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); |
7f0a7c67 AO |
800 | return -EBUSY; |
801 | } | |
802 | ||
803 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
804 | time_cmd.id_and_color = | |
805 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
f991e17b | 806 | time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
7f0a7c67 AO |
807 | time_cmd.apply_time = cpu_to_le32(apply_time); |
808 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
809 | time_cmd.duration = cpu_to_le32(duration); | |
810 | time_cmd.repeat = 1; | |
811 | time_cmd.interval = cpu_to_le32(1); | |
812 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
813 | TE_V2_ABSENCE); | |
814 | ||
815 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
816 | } |