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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)) { | |
060b4460 JB |
200 | if (te_data->vif->type == NL80211_IFTYPE_STATION) |
201 | ieee80211_connection_loss(te_data->vif); | |
dc88b4ba | 202 | IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); |
0c6505c6 | 203 | iwl_mvm_te_clear_data(mvm, te_data); |
dc88b4ba LC |
204 | return; |
205 | } | |
206 | ||
207 | switch (te_data->vif->type) { | |
208 | case NL80211_IFTYPE_AP: | |
209 | iwl_mvm_csa_noa_start(mvm); | |
210 | break; | |
211 | case NL80211_IFTYPE_STATION: | |
212 | iwl_mvm_csa_client_absent(mvm, te_data->vif); | |
622e3f9b | 213 | ieee80211_chswitch_done(te_data->vif, true); |
dc88b4ba LC |
214 | break; |
215 | default: | |
216 | /* should never happen */ | |
217 | WARN_ON_ONCE(1); | |
218 | break; | |
219 | } | |
220 | ||
221 | /* we don't need it anymore */ | |
222 | iwl_mvm_te_clear_data(mvm, te_data); | |
223 | } | |
224 | ||
8ca151b5 JB |
225 | /* |
226 | * Handles a FW notification for an event that is known to the driver. | |
227 | * | |
228 | * @mvm: the mvm component | |
229 | * @te_data: the time event data | |
230 | * @notif: the notification data corresponding the time event data. | |
231 | */ | |
232 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
233 | struct iwl_mvm_time_event_data *te_data, | |
234 | struct iwl_time_event_notif *notif) | |
235 | { | |
236 | lockdep_assert_held(&mvm->time_event_lock); | |
237 | ||
238 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
239 | le32_to_cpu(notif->unique_id), | |
240 | le32_to_cpu(notif->action)); | |
241 | ||
242 | /* | |
243 | * The FW sends the start/end time event notifications even for events | |
244 | * that it fails to schedule. This is indicated in the status field of | |
245 | * the notification. This happens in cases that the scheduler cannot | |
246 | * find a schedule that can handle the event (for example requesting a | |
247 | * P2P Device discoveribility, while there are other higher priority | |
248 | * events in the system). | |
249 | */ | |
9fc3fe96 EG |
250 | if (!le32_to_cpu(notif->status)) { |
251 | bool start = le32_to_cpu(notif->action) & | |
252 | TE_V2_NOTIF_HOST_EVENT_START; | |
253 | IWL_WARN(mvm, "Time Event %s notification failure\n", | |
254 | start ? "start" : "end"); | |
05739794 JB |
255 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { |
256 | iwl_mvm_te_clear_data(mvm, te_data); | |
257 | return; | |
258 | } | |
259 | } | |
8ca151b5 | 260 | |
f8f03c3e | 261 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
262 | IWL_DEBUG_TE(mvm, |
263 | "TE ended - current time %lu, estimated end %lu\n", | |
264 | jiffies, te_data->end_jiffies); | |
265 | ||
266 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
267 | ieee80211_remain_on_channel_expired(mvm->hw); | |
268 | iwl_mvm_roc_finished(mvm); | |
269 | } | |
270 | ||
271 | /* | |
272 | * By now, we should have finished association | |
273 | * and know the dtim period. | |
274 | */ | |
05739794 | 275 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
2e515bf0 | 276 | "No association and the time event is over already..."); |
8ca151b5 | 277 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 278 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 279 | te_data->running = true; |
e7f1935c | 280 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
281 | |
282 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
283 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 284 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 | 285 | ieee80211_ready_on_channel(mvm->hw); |
dc88b4ba LC |
286 | } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
287 | iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); | |
8ca151b5 JB |
288 | } |
289 | } else { | |
290 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
291 | } | |
292 | } | |
293 | ||
b112889c AM |
294 | /* |
295 | * Handle A Aux ROC time event | |
296 | */ | |
297 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
298 | struct iwl_time_event_notif *notif) | |
299 | { | |
300 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
301 | bool aux_roc_te = false; | |
302 | ||
303 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
304 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
305 | aux_roc_te = true; | |
306 | break; | |
307 | } | |
308 | } | |
309 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
310 | return -EINVAL; | |
311 | ||
312 | if (!le32_to_cpu(notif->status)) { | |
313 | IWL_DEBUG_TE(mvm, | |
314 | "ERROR: Aux ROC Time Event %s notification failure\n", | |
315 | (le32_to_cpu(notif->action) & | |
316 | TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); | |
317 | return -EINVAL; | |
318 | } | |
319 | ||
320 | IWL_DEBUG_TE(mvm, | |
321 | "Aux ROC time event notification - UID = 0x%x action %d\n", | |
322 | le32_to_cpu(notif->unique_id), | |
323 | le32_to_cpu(notif->action)); | |
324 | ||
325 | if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
326 | /* End TE, notify mac80211 */ | |
327 | ieee80211_remain_on_channel_expired(mvm->hw); | |
328 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
329 | list_del(&te_data->list); /* remove from list */ | |
330 | te_data->running = false; | |
331 | te_data->vif = NULL; | |
332 | te_data->uid = 0; | |
a6cc5163 | 333 | te_data->id = TE_MAX; |
b112889c | 334 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
b112889c AM |
335 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
336 | te_data->running = true; | |
337 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ | |
338 | } else { | |
339 | IWL_DEBUG_TE(mvm, | |
340 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
341 | le32_to_cpu(notif->action)); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
8ca151b5 JB |
348 | /* |
349 | * The Rx handler for time event notifications | |
350 | */ | |
351 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
352 | struct iwl_rx_cmd_buffer *rxb, | |
353 | struct iwl_device_cmd *cmd) | |
354 | { | |
355 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
356 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
357 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
358 | ||
359 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
360 | le32_to_cpu(notif->unique_id), | |
361 | le32_to_cpu(notif->action)); | |
362 | ||
363 | spin_lock_bh(&mvm->time_event_lock); | |
b112889c AM |
364 | /* This time event is triggered for Aux ROC request */ |
365 | if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) | |
366 | goto unlock; | |
367 | ||
8ca151b5 JB |
368 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
369 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
370 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
371 | } | |
b112889c | 372 | unlock: |
8ca151b5 JB |
373 | spin_unlock_bh(&mvm->time_event_lock); |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
d20d37bc LK |
378 | static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
379 | struct iwl_rx_packet *pkt, void *data) | |
380 | { | |
381 | struct iwl_mvm *mvm = | |
382 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
383 | struct iwl_mvm_time_event_data *te_data = data; | |
384 | struct iwl_time_event_notif *resp; | |
385 | int resp_len = iwl_rx_packet_payload_len(pkt); | |
386 | ||
387 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) | |
388 | return true; | |
389 | ||
390 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { | |
391 | IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); | |
392 | return true; | |
393 | } | |
394 | ||
395 | resp = (void *)pkt->data; | |
396 | ||
397 | /* te_data->uid is already set in the TIME_EVENT_CMD response */ | |
398 | if (le32_to_cpu(resp->unique_id) != te_data->uid) | |
399 | return false; | |
400 | ||
401 | IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", | |
402 | te_data->uid); | |
403 | if (!resp->status) | |
404 | IWL_ERR(mvm, | |
405 | "TIME_EVENT_NOTIFICATION received but not executed\n"); | |
406 | ||
407 | return true; | |
408 | } | |
409 | ||
ffdf968d JB |
410 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
411 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
412 | { |
413 | struct iwl_mvm *mvm = | |
414 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
415 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 416 | struct iwl_time_event_resp *resp; |
65b30348 | 417 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 418 | |
ffdf968d JB |
419 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
420 | return true; | |
8ca151b5 | 421 | |
65b30348 | 422 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
423 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
424 | return true; | |
425 | } | |
8ca151b5 | 426 | |
ffdf968d | 427 | resp = (void *)pkt->data; |
e3722822 JB |
428 | |
429 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
430 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
431 | return false; | |
432 | ||
ffdf968d JB |
433 | te_data->uid = le32_to_cpu(resp->unique_id); |
434 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
435 | te_data->uid); | |
436 | return true; | |
437 | } | |
8ca151b5 | 438 | |
ffdf968d JB |
439 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
440 | struct ieee80211_vif *vif, | |
441 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 442 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d JB |
443 | { |
444 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
445 | struct iwl_notification_wait wait_time_event; | |
446 | int ret; | |
447 | ||
448 | lockdep_assert_held(&mvm->mutex); | |
449 | ||
93630dc3 JB |
450 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
451 | le32_to_cpu(te_cmd->duration)); | |
452 | ||
ffdf968d JB |
453 | spin_lock_bh(&mvm->time_event_lock); |
454 | if (WARN_ON(te_data->id != TE_MAX)) { | |
455 | spin_unlock_bh(&mvm->time_event_lock); | |
456 | return -EIO; | |
457 | } | |
458 | te_data->vif = vif; | |
459 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
460 | te_data->id = le32_to_cpu(te_cmd->id); | |
461 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
462 | spin_unlock_bh(&mvm->time_event_lock); | |
463 | ||
464 | /* | |
465 | * Use a notification wait, which really just processes the | |
466 | * command response and doesn't wait for anything, in order | |
467 | * to be able to process the response and get the UID inside | |
468 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
469 | * stores the buffer and then wakes up this thread, by which | |
470 | * time another notification (that the time event started) | |
471 | * might already be processed unsuccessfully. | |
472 | */ | |
473 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
474 | time_event_response, | |
475 | ARRAY_SIZE(time_event_response), | |
476 | iwl_mvm_time_event_response, te_data); | |
477 | ||
a1022927 | 478 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 479 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
480 | if (ret) { |
481 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
482 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
483 | goto out_clear_te; | |
484 | } | |
8ca151b5 | 485 | |
ffdf968d JB |
486 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
487 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
488 | /* should never fail */ | |
489 | WARN_ON_ONCE(ret); | |
490 | ||
491 | if (ret) { | |
492 | out_clear_te: | |
493 | spin_lock_bh(&mvm->time_event_lock); | |
494 | iwl_mvm_te_clear_data(mvm, te_data); | |
495 | spin_unlock_bh(&mvm->time_event_lock); | |
496 | } | |
497 | return ret; | |
8ca151b5 JB |
498 | } |
499 | ||
500 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
501 | struct ieee80211_vif *vif, | |
016d27e1 | 502 | u32 duration, u32 min_duration, |
d20d37bc | 503 | u32 max_delay, bool wait_for_notif) |
8ca151b5 JB |
504 | { |
505 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
506 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
d20d37bc LK |
507 | const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
508 | struct iwl_notification_wait wait_te_notif; | |
a373f67c | 509 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
510 | |
511 | lockdep_assert_held(&mvm->mutex); | |
512 | ||
513 | if (te_data->running && | |
e7f1935c | 514 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
515 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
516 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
517 | return; | |
518 | } | |
519 | ||
520 | if (te_data->running) { | |
521 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
522 | te_data->uid, | |
523 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
524 | /* | |
525 | * we don't have enough time | |
526 | * cancel the current TE and issue a new one | |
527 | * Of course it would be better to remove the old one only | |
528 | * when the new one is added, but we don't care if we are off | |
529 | * channel for a bit. All we need to do, is not to return | |
530 | * before we actually begin to be on the channel. | |
531 | */ | |
532 | iwl_mvm_stop_session_protection(mvm, vif); | |
533 | } | |
534 | ||
8ca151b5 JB |
535 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
536 | time_cmd.id_and_color = | |
537 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
538 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
539 | ||
540 | time_cmd.apply_time = | |
541 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 542 | |
f8f03c3e | 543 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 544 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
545 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
546 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 547 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
548 | time_cmd.repeat = 1; |
549 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
550 | TE_V2_NOTIF_HOST_EVENT_END | |
551 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 552 | |
d20d37bc LK |
553 | if (!wait_for_notif) { |
554 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
555 | return; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Create notification_wait for the TIME_EVENT_NOTIFICATION to use | |
560 | * right after we send the time event | |
561 | */ | |
562 | iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, | |
563 | te_notif_response, | |
564 | ARRAY_SIZE(te_notif_response), | |
565 | iwl_mvm_te_notif, te_data); | |
566 | ||
567 | /* If TE was sent OK - wait for the notification that started */ | |
568 | if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { | |
569 | IWL_ERR(mvm, "Failed to add TE to protect session\n"); | |
570 | iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); | |
571 | } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, | |
572 | TU_TO_JIFFIES(max_delay))) { | |
573 | IWL_ERR(mvm, "Failed to protect session until TE\n"); | |
574 | } | |
8ca151b5 JB |
575 | } |
576 | ||
bf5da87f MG |
577 | static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
578 | struct iwl_mvm_time_event_data *te_data, | |
579 | u32 *uid) | |
8ca151b5 | 580 | { |
bf5da87f | 581 | u32 id; |
8ca151b5 JB |
582 | |
583 | /* | |
584 | * It is possible that by the time we got to this point the time | |
585 | * event was already removed. | |
586 | */ | |
587 | spin_lock_bh(&mvm->time_event_lock); | |
588 | ||
589 | /* Save time event uid before clearing its data */ | |
bf5da87f | 590 | *uid = te_data->uid; |
8ca151b5 JB |
591 | id = te_data->id; |
592 | ||
593 | /* | |
594 | * The clear_data function handles time events that were already removed | |
595 | */ | |
596 | iwl_mvm_te_clear_data(mvm, te_data); | |
597 | spin_unlock_bh(&mvm->time_event_lock); | |
598 | ||
599 | /* | |
600 | * It is possible that by the time we try to remove it, the time event | |
601 | * has already ended and removed. In such a case there is no need to | |
602 | * send a removal command. | |
603 | */ | |
604 | if (id == TE_MAX) { | |
bf5da87f MG |
605 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
606 | return false; | |
8ca151b5 JB |
607 | } |
608 | ||
bf5da87f MG |
609 | return true; |
610 | } | |
611 | ||
612 | /* | |
613 | * Explicit request to remove a aux roc time event. The removal of a time | |
614 | * event needs to be synchronized with the flow of a time event's end | |
615 | * notification, which also removes the time event from the op mode | |
616 | * data structures. | |
617 | */ | |
618 | static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, | |
619 | struct iwl_mvm_vif *mvmvif, | |
620 | struct iwl_mvm_time_event_data *te_data) | |
621 | { | |
622 | struct iwl_hs20_roc_req aux_cmd = {}; | |
623 | u32 uid; | |
624 | int ret; | |
625 | ||
626 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
627 | return; | |
628 | ||
629 | aux_cmd.event_unique_id = cpu_to_le32(uid); | |
630 | aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
631 | aux_cmd.id_and_color = | |
632 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
633 | IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", | |
634 | le32_to_cpu(aux_cmd.event_unique_id)); | |
635 | ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, | |
636 | sizeof(aux_cmd), &aux_cmd); | |
637 | ||
638 | if (WARN_ON(ret)) | |
639 | return; | |
640 | } | |
641 | ||
642 | /* | |
643 | * Explicit request to remove a time event. The removal of a time event needs to | |
644 | * be synchronized with the flow of a time event's end notification, which also | |
645 | * removes the time event from the op mode data structures. | |
646 | */ | |
647 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
648 | struct iwl_mvm_vif *mvmvif, | |
649 | struct iwl_mvm_time_event_data *te_data) | |
650 | { | |
651 | struct iwl_time_event_cmd time_cmd = {}; | |
652 | u32 uid; | |
653 | int ret; | |
654 | ||
655 | if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) | |
656 | return; | |
657 | ||
8ca151b5 JB |
658 | /* When we remove a TE, the UID is to be set in the id field */ |
659 | time_cmd.id = cpu_to_le32(uid); | |
660 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
661 | time_cmd.id_and_color = | |
662 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
663 | ||
664 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 665 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 666 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
667 | if (WARN_ON(ret)) |
668 | return; | |
669 | } | |
670 | ||
671 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
672 | struct ieee80211_vif *vif) | |
673 | { | |
674 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
675 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
676 | ||
677 | lockdep_assert_held(&mvm->mutex); | |
678 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
679 | } | |
680 | ||
8ca151b5 | 681 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 682 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
683 | { |
684 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
685 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 686 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
687 | |
688 | lockdep_assert_held(&mvm->mutex); | |
689 | if (te_data->running) { | |
690 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
691 | return -EBUSY; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Flush the done work, just in case it's still pending, so that | |
696 | * the work it does can complete and we can accept new frames. | |
697 | */ | |
698 | flush_work(&mvm->roc_done_wk); | |
699 | ||
8ca151b5 JB |
700 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
701 | time_cmd.id_and_color = | |
702 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
703 | |
704 | switch (type) { | |
705 | case IEEE80211_ROC_TYPE_NORMAL: | |
706 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
707 | break; | |
708 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
709 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
710 | break; | |
711 | default: | |
712 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
713 | return -EINVAL; | |
714 | } | |
8ca151b5 JB |
715 | |
716 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
717 | time_cmd.interval = cpu_to_le32(1); |
718 | ||
719 | /* | |
e635c797 | 720 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 721 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
722 | * scheduled. To improve the chances of it being scheduled, allow them |
723 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 724 | */ |
f8f03c3e | 725 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
726 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
727 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
728 | time_cmd.repeat = 1; |
729 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
730 | TE_V2_NOTIF_HOST_EVENT_END | |
731 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 732 | |
ffdf968d | 733 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
734 | } |
735 | ||
bf5da87f | 736 | void iwl_mvm_stop_roc(struct iwl_mvm *mvm) |
8ca151b5 JB |
737 | { |
738 | struct iwl_mvm_vif *mvmvif; | |
739 | struct iwl_mvm_time_event_data *te_data; | |
bf5da87f | 740 | bool is_p2p = false; |
8ca151b5 JB |
741 | |
742 | lockdep_assert_held(&mvm->mutex); | |
743 | ||
bf5da87f MG |
744 | mvmvif = NULL; |
745 | spin_lock_bh(&mvm->time_event_lock); | |
746 | ||
8ca151b5 JB |
747 | /* |
748 | * Iterate over the list of time events and find the time event that is | |
749 | * associated with a P2P_DEVICE interface. | |
750 | * This assumes that a P2P_DEVICE interface can have only a single time | |
751 | * event at any given time and this time event coresponds to a ROC | |
752 | * request | |
753 | */ | |
8ca151b5 | 754 | list_for_each_entry(te_data, &mvm->time_event_list, list) { |
833d9b97 | 755 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
8ca151b5 | 756 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
bf5da87f MG |
757 | is_p2p = true; |
758 | goto remove_te; | |
759 | } | |
760 | } | |
761 | ||
762 | /* | |
763 | * Iterate over the list of aux roc time events and find the time | |
764 | * event that is associated with a BSS interface. | |
765 | * This assumes that a BSS interface can have only a single time | |
766 | * event at any given time and this time event coresponds to a ROC | |
767 | * request | |
768 | */ | |
769 | list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) { | |
833d9b97 AO |
770 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
771 | goto remove_te; | |
8ca151b5 | 772 | } |
bf5da87f MG |
773 | |
774 | remove_te: | |
8ca151b5 JB |
775 | spin_unlock_bh(&mvm->time_event_lock); |
776 | ||
777 | if (!mvmvif) { | |
bf5da87f | 778 | IWL_WARN(mvm, "No remain on channel event\n"); |
8ca151b5 JB |
779 | return; |
780 | } | |
781 | ||
bf5da87f MG |
782 | if (is_p2p) |
783 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
784 | else | |
785 | iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); | |
8ca151b5 JB |
786 | |
787 | iwl_mvm_roc_finished(mvm); | |
788 | } | |
7f0a7c67 | 789 | |
f991e17b LC |
790 | int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
791 | struct ieee80211_vif *vif, | |
792 | u32 duration, u32 apply_time) | |
7f0a7c67 AO |
793 | { |
794 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
795 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
796 | struct iwl_time_event_cmd time_cmd = {}; | |
797 | ||
798 | lockdep_assert_held(&mvm->mutex); | |
799 | ||
800 | if (te_data->running) { | |
f991e17b | 801 | IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); |
7f0a7c67 AO |
802 | return -EBUSY; |
803 | } | |
804 | ||
805 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
806 | time_cmd.id_and_color = | |
807 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
f991e17b | 808 | time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
7f0a7c67 AO |
809 | time_cmd.apply_time = cpu_to_le32(apply_time); |
810 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
811 | time_cmd.duration = cpu_to_le32(duration); | |
812 | time_cmd.repeat = 1; | |
813 | time_cmd.interval = cpu_to_le32(1); | |
814 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
815 | TE_V2_ABSENCE); | |
816 | ||
817 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
818 | } |