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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. |
8ca151b5 JB |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 25 | * in the file called COPYING. |
8ca151b5 JB |
26 | * |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
51368bf7 | 33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8ca151b5 JB |
34 | * All rights reserved. |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | ||
64 | #include <linux/jiffies.h> | |
65 | #include <net/mac80211.h> | |
66 | ||
67 | #include "iwl-notif-wait.h" | |
68 | #include "iwl-trans.h" | |
69 | #include "fw-api.h" | |
70 | #include "time-event.h" | |
71 | #include "mvm.h" | |
72 | #include "iwl-io.h" | |
73 | #include "iwl-prph.h" | |
74 | ||
e635c797 IP |
75 | /* |
76 | * For the high priority TE use a time event type that has similar priority to | |
77 | * the FW's action scan priority. | |
456f6ddf | 78 | */ |
e635c797 IP |
79 | #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
80 | #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC | |
456f6ddf | 81 | |
8ca151b5 JB |
82 | void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
83 | struct iwl_mvm_time_event_data *te_data) | |
84 | { | |
85 | lockdep_assert_held(&mvm->time_event_lock); | |
86 | ||
87 | if (te_data->id == TE_MAX) | |
88 | return; | |
89 | ||
90 | list_del(&te_data->list); | |
91 | te_data->running = false; | |
92 | te_data->uid = 0; | |
93 | te_data->id = TE_MAX; | |
94 | te_data->vif = NULL; | |
95 | } | |
96 | ||
97 | void iwl_mvm_roc_done_wk(struct work_struct *wk) | |
98 | { | |
99 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); | |
b112889c AM |
100 | u32 queues = 0; |
101 | ||
102 | /* | |
103 | * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. | |
104 | * This will cause the TX path to drop offchannel transmissions. | |
105 | * That would also be done by mac80211, but it is racy, in particular | |
106 | * in the case that the time event actually completed in the firmware | |
107 | * (which is handled in iwl_mvm_te_handle_notif). | |
108 | */ | |
109 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) | |
110 | queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE); | |
111 | if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) | |
112 | queues |= BIT(mvm->aux_queue); | |
113 | ||
114 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); | |
8ca151b5 JB |
115 | |
116 | synchronize_net(); | |
117 | ||
118 | /* | |
119 | * Flush the offchannel queue -- this is called when the time | |
120 | * event finishes or is cancelled, so that frames queued for it | |
121 | * won't get stuck on the queue and be transmitted in the next | |
122 | * time event. | |
123 | * We have to send the command asynchronously since this cannot | |
124 | * be under the mutex for locking reasons, but that's not an | |
125 | * issue as it will have to complete before the next command is | |
126 | * executed, and a new time event means a new command. | |
127 | */ | |
b112889c | 128 | iwl_mvm_flush_tx_path(mvm, queues, false); |
8ca151b5 JB |
129 | } |
130 | ||
131 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
132 | { | |
8ca151b5 JB |
133 | /* |
134 | * Of course, our status bit is just as racy as mac80211, so in | |
135 | * addition, fire off the work struct which will drop all frames | |
136 | * from the hardware queues that made it through the race. First | |
137 | * it will of course synchronize the TX path to make sure that | |
138 | * any *new* TX will be rejected. | |
139 | */ | |
140 | schedule_work(&mvm->roc_done_wk); | |
141 | } | |
142 | ||
7f0a7c67 AO |
143 | static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
144 | { | |
145 | struct ieee80211_vif *csa_vif; | |
146 | ||
147 | rcu_read_lock(); | |
148 | ||
149 | csa_vif = rcu_dereference(mvm->csa_vif); | |
150 | if (!csa_vif || !csa_vif->csa_active) | |
151 | goto out_unlock; | |
152 | ||
153 | IWL_DEBUG_TE(mvm, "CSA NOA started\n"); | |
154 | ||
155 | /* | |
156 | * CSA NoA is started but we still have beacons to | |
157 | * transmit on the current channel. | |
158 | * So we just do nothing here and the switch | |
159 | * will be performed on the last TBTT. | |
160 | */ | |
161 | if (!ieee80211_csa_is_complete(csa_vif)) { | |
162 | IWL_WARN(mvm, "CSA NOA started too early\n"); | |
163 | goto out_unlock; | |
164 | } | |
165 | ||
166 | ieee80211_csa_finish(csa_vif); | |
167 | ||
168 | rcu_read_unlock(); | |
169 | ||
170 | RCU_INIT_POINTER(mvm->csa_vif, NULL); | |
171 | ||
172 | return; | |
173 | ||
174 | out_unlock: | |
175 | rcu_read_unlock(); | |
176 | } | |
177 | ||
05739794 JB |
178 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
179 | struct ieee80211_vif *vif, | |
180 | const char *errmsg) | |
181 | { | |
182 | if (vif->type != NL80211_IFTYPE_STATION) | |
183 | return false; | |
184 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
185 | return false; | |
186 | if (errmsg) | |
187 | IWL_ERR(mvm, "%s\n", errmsg); | |
188 | ieee80211_connection_loss(vif); | |
189 | return true; | |
190 | } | |
191 | ||
8ca151b5 JB |
192 | /* |
193 | * Handles a FW notification for an event that is known to the driver. | |
194 | * | |
195 | * @mvm: the mvm component | |
196 | * @te_data: the time event data | |
197 | * @notif: the notification data corresponding the time event data. | |
198 | */ | |
199 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
200 | struct iwl_mvm_time_event_data *te_data, | |
201 | struct iwl_time_event_notif *notif) | |
202 | { | |
203 | lockdep_assert_held(&mvm->time_event_lock); | |
204 | ||
205 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
206 | le32_to_cpu(notif->unique_id), | |
207 | le32_to_cpu(notif->action)); | |
208 | ||
209 | /* | |
210 | * The FW sends the start/end time event notifications even for events | |
211 | * that it fails to schedule. This is indicated in the status field of | |
212 | * the notification. This happens in cases that the scheduler cannot | |
213 | * find a schedule that can handle the event (for example requesting a | |
214 | * P2P Device discoveribility, while there are other higher priority | |
215 | * events in the system). | |
216 | */ | |
9fc3fe96 EG |
217 | if (!le32_to_cpu(notif->status)) { |
218 | bool start = le32_to_cpu(notif->action) & | |
219 | TE_V2_NOTIF_HOST_EVENT_START; | |
220 | IWL_WARN(mvm, "Time Event %s notification failure\n", | |
221 | start ? "start" : "end"); | |
05739794 JB |
222 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { |
223 | iwl_mvm_te_clear_data(mvm, te_data); | |
224 | return; | |
225 | } | |
226 | } | |
8ca151b5 | 227 | |
f8f03c3e | 228 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
229 | IWL_DEBUG_TE(mvm, |
230 | "TE ended - current time %lu, estimated end %lu\n", | |
231 | jiffies, te_data->end_jiffies); | |
232 | ||
233 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
234 | ieee80211_remain_on_channel_expired(mvm->hw); | |
235 | iwl_mvm_roc_finished(mvm); | |
236 | } | |
237 | ||
238 | /* | |
239 | * By now, we should have finished association | |
240 | * and know the dtim period. | |
241 | */ | |
05739794 | 242 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
2e515bf0 | 243 | "No association and the time event is over already..."); |
8ca151b5 | 244 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 245 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 246 | te_data->running = true; |
e7f1935c | 247 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
248 | |
249 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
250 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 251 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 | 252 | ieee80211_ready_on_channel(mvm->hw); |
7f0a7c67 AO |
253 | } else if (te_data->vif->type == NL80211_IFTYPE_AP) { |
254 | if (le32_to_cpu(notif->status)) | |
255 | iwl_mvm_csa_noa_start(mvm); | |
256 | else | |
257 | IWL_DEBUG_TE(mvm, "CSA NOA failed to start\n"); | |
258 | ||
259 | /* we don't need it anymore */ | |
260 | iwl_mvm_te_clear_data(mvm, te_data); | |
8ca151b5 JB |
261 | } |
262 | } else { | |
263 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
264 | } | |
265 | } | |
266 | ||
b112889c AM |
267 | /* |
268 | * Handle A Aux ROC time event | |
269 | */ | |
270 | static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, | |
271 | struct iwl_time_event_notif *notif) | |
272 | { | |
273 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
274 | bool aux_roc_te = false; | |
275 | ||
276 | list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { | |
277 | if (le32_to_cpu(notif->unique_id) == te_data->uid) { | |
278 | aux_roc_te = true; | |
279 | break; | |
280 | } | |
281 | } | |
282 | if (!aux_roc_te) /* Not a Aux ROC time event */ | |
283 | return -EINVAL; | |
284 | ||
285 | if (!le32_to_cpu(notif->status)) { | |
286 | IWL_DEBUG_TE(mvm, | |
287 | "ERROR: Aux ROC Time Event %s notification failure\n", | |
288 | (le32_to_cpu(notif->action) & | |
289 | TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); | |
290 | return -EINVAL; | |
291 | } | |
292 | ||
293 | IWL_DEBUG_TE(mvm, | |
294 | "Aux ROC time event notification - UID = 0x%x action %d\n", | |
295 | le32_to_cpu(notif->unique_id), | |
296 | le32_to_cpu(notif->action)); | |
297 | ||
298 | if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { | |
299 | /* End TE, notify mac80211 */ | |
300 | ieee80211_remain_on_channel_expired(mvm->hw); | |
301 | iwl_mvm_roc_finished(mvm); /* flush aux queue */ | |
302 | list_del(&te_data->list); /* remove from list */ | |
303 | te_data->running = false; | |
304 | te_data->vif = NULL; | |
305 | te_data->uid = 0; | |
306 | } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { | |
307 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
308 | set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); | |
309 | te_data->running = true; | |
310 | ieee80211_ready_on_channel(mvm->hw); /* Start TE */ | |
311 | } else { | |
312 | IWL_DEBUG_TE(mvm, | |
313 | "ERROR: Unknown Aux ROC Time Event (action = %d)\n", | |
314 | le32_to_cpu(notif->action)); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
8ca151b5 JB |
321 | /* |
322 | * The Rx handler for time event notifications | |
323 | */ | |
324 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
325 | struct iwl_rx_cmd_buffer *rxb, | |
326 | struct iwl_device_cmd *cmd) | |
327 | { | |
328 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
329 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
330 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
331 | ||
332 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
333 | le32_to_cpu(notif->unique_id), | |
334 | le32_to_cpu(notif->action)); | |
335 | ||
336 | spin_lock_bh(&mvm->time_event_lock); | |
b112889c AM |
337 | /* This time event is triggered for Aux ROC request */ |
338 | if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) | |
339 | goto unlock; | |
340 | ||
8ca151b5 JB |
341 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
342 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
343 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
344 | } | |
b112889c | 345 | unlock: |
8ca151b5 JB |
346 | spin_unlock_bh(&mvm->time_event_lock); |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
ffdf968d JB |
351 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
352 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
353 | { |
354 | struct iwl_mvm *mvm = | |
355 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
356 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 357 | struct iwl_time_event_resp *resp; |
65b30348 | 358 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 359 | |
ffdf968d JB |
360 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
361 | return true; | |
8ca151b5 | 362 | |
65b30348 | 363 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
364 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
365 | return true; | |
366 | } | |
8ca151b5 | 367 | |
ffdf968d | 368 | resp = (void *)pkt->data; |
e3722822 JB |
369 | |
370 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
371 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
372 | return false; | |
373 | ||
ffdf968d JB |
374 | te_data->uid = le32_to_cpu(resp->unique_id); |
375 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
376 | te_data->uid); | |
377 | return true; | |
378 | } | |
8ca151b5 | 379 | |
ffdf968d JB |
380 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
381 | struct ieee80211_vif *vif, | |
382 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 383 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d JB |
384 | { |
385 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
386 | struct iwl_notification_wait wait_time_event; | |
387 | int ret; | |
388 | ||
389 | lockdep_assert_held(&mvm->mutex); | |
390 | ||
93630dc3 JB |
391 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
392 | le32_to_cpu(te_cmd->duration)); | |
393 | ||
ffdf968d JB |
394 | spin_lock_bh(&mvm->time_event_lock); |
395 | if (WARN_ON(te_data->id != TE_MAX)) { | |
396 | spin_unlock_bh(&mvm->time_event_lock); | |
397 | return -EIO; | |
398 | } | |
399 | te_data->vif = vif; | |
400 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
401 | te_data->id = le32_to_cpu(te_cmd->id); | |
402 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
403 | spin_unlock_bh(&mvm->time_event_lock); | |
404 | ||
405 | /* | |
406 | * Use a notification wait, which really just processes the | |
407 | * command response and doesn't wait for anything, in order | |
408 | * to be able to process the response and get the UID inside | |
409 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
410 | * stores the buffer and then wakes up this thread, by which | |
411 | * time another notification (that the time event started) | |
412 | * might already be processed unsuccessfully. | |
413 | */ | |
414 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
415 | time_event_response, | |
416 | ARRAY_SIZE(time_event_response), | |
417 | iwl_mvm_time_event_response, te_data); | |
418 | ||
a1022927 | 419 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 420 | sizeof(*te_cmd), te_cmd); |
ffdf968d JB |
421 | if (ret) { |
422 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
423 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
424 | goto out_clear_te; | |
425 | } | |
8ca151b5 | 426 | |
ffdf968d JB |
427 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
428 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
429 | /* should never fail */ | |
430 | WARN_ON_ONCE(ret); | |
431 | ||
432 | if (ret) { | |
433 | out_clear_te: | |
434 | spin_lock_bh(&mvm->time_event_lock); | |
435 | iwl_mvm_te_clear_data(mvm, te_data); | |
436 | spin_unlock_bh(&mvm->time_event_lock); | |
437 | } | |
438 | return ret; | |
8ca151b5 JB |
439 | } |
440 | ||
441 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
442 | struct ieee80211_vif *vif, | |
016d27e1 JB |
443 | u32 duration, u32 min_duration, |
444 | u32 max_delay) | |
8ca151b5 JB |
445 | { |
446 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
447 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 448 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
449 | |
450 | lockdep_assert_held(&mvm->mutex); | |
451 | ||
452 | if (te_data->running && | |
e7f1935c | 453 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
454 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
455 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
456 | return; | |
457 | } | |
458 | ||
459 | if (te_data->running) { | |
460 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
461 | te_data->uid, | |
462 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
463 | /* | |
464 | * we don't have enough time | |
465 | * cancel the current TE and issue a new one | |
466 | * Of course it would be better to remove the old one only | |
467 | * when the new one is added, but we don't care if we are off | |
468 | * channel for a bit. All we need to do, is not to return | |
469 | * before we actually begin to be on the channel. | |
470 | */ | |
471 | iwl_mvm_stop_session_protection(mvm, vif); | |
472 | } | |
473 | ||
8ca151b5 JB |
474 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
475 | time_cmd.id_and_color = | |
476 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
477 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
478 | ||
479 | time_cmd.apply_time = | |
480 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 481 | |
f8f03c3e | 482 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 483 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
484 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
485 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 486 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
487 | time_cmd.repeat = 1; |
488 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
489 | TE_V2_NOTIF_HOST_EVENT_END | |
490 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 491 | |
ffdf968d | 492 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
493 | } |
494 | ||
495 | /* | |
496 | * Explicit request to remove a time event. The removal of a time event needs to | |
497 | * be synchronized with the flow of a time event's end notification, which also | |
498 | * removes the time event from the op mode data structures. | |
499 | */ | |
500 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
501 | struct iwl_mvm_vif *mvmvif, | |
502 | struct iwl_mvm_time_event_data *te_data) | |
503 | { | |
a373f67c | 504 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
505 | u32 id, uid; |
506 | int ret; | |
507 | ||
508 | /* | |
509 | * It is possible that by the time we got to this point the time | |
510 | * event was already removed. | |
511 | */ | |
512 | spin_lock_bh(&mvm->time_event_lock); | |
513 | ||
514 | /* Save time event uid before clearing its data */ | |
515 | uid = te_data->uid; | |
516 | id = te_data->id; | |
517 | ||
518 | /* | |
519 | * The clear_data function handles time events that were already removed | |
520 | */ | |
521 | iwl_mvm_te_clear_data(mvm, te_data); | |
522 | spin_unlock_bh(&mvm->time_event_lock); | |
523 | ||
524 | /* | |
525 | * It is possible that by the time we try to remove it, the time event | |
526 | * has already ended and removed. In such a case there is no need to | |
527 | * send a removal command. | |
528 | */ | |
529 | if (id == TE_MAX) { | |
530 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", uid); | |
531 | return; | |
532 | } | |
533 | ||
534 | /* When we remove a TE, the UID is to be set in the id field */ | |
535 | time_cmd.id = cpu_to_le32(uid); | |
536 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
537 | time_cmd.id_and_color = | |
538 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
539 | ||
540 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a1022927 | 541 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
a373f67c | 542 | sizeof(time_cmd), &time_cmd); |
8ca151b5 JB |
543 | if (WARN_ON(ret)) |
544 | return; | |
545 | } | |
546 | ||
547 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
548 | struct ieee80211_vif *vif) | |
549 | { | |
550 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
551 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
552 | ||
553 | lockdep_assert_held(&mvm->mutex); | |
554 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
555 | } | |
556 | ||
8ca151b5 | 557 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 558 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
559 | { |
560 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
561 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 562 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
563 | |
564 | lockdep_assert_held(&mvm->mutex); | |
565 | if (te_data->running) { | |
566 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
567 | return -EBUSY; | |
568 | } | |
569 | ||
570 | /* | |
571 | * Flush the done work, just in case it's still pending, so that | |
572 | * the work it does can complete and we can accept new frames. | |
573 | */ | |
574 | flush_work(&mvm->roc_done_wk); | |
575 | ||
8ca151b5 JB |
576 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
577 | time_cmd.id_and_color = | |
578 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
579 | |
580 | switch (type) { | |
581 | case IEEE80211_ROC_TYPE_NORMAL: | |
582 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
583 | break; | |
584 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
585 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
586 | break; | |
587 | default: | |
588 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
589 | return -EINVAL; | |
590 | } | |
8ca151b5 JB |
591 | |
592 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
593 | time_cmd.interval = cpu_to_le32(1); |
594 | ||
595 | /* | |
e635c797 | 596 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 597 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
598 | * scheduled. To improve the chances of it being scheduled, allow them |
599 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 600 | */ |
f8f03c3e | 601 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
602 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
603 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
604 | time_cmd.repeat = 1; |
605 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
606 | TE_V2_NOTIF_HOST_EVENT_END | |
607 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 608 | |
ffdf968d | 609 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
610 | } |
611 | ||
612 | void iwl_mvm_stop_p2p_roc(struct iwl_mvm *mvm) | |
613 | { | |
614 | struct iwl_mvm_vif *mvmvif; | |
615 | struct iwl_mvm_time_event_data *te_data; | |
616 | ||
617 | lockdep_assert_held(&mvm->mutex); | |
618 | ||
619 | /* | |
620 | * Iterate over the list of time events and find the time event that is | |
621 | * associated with a P2P_DEVICE interface. | |
622 | * This assumes that a P2P_DEVICE interface can have only a single time | |
623 | * event at any given time and this time event coresponds to a ROC | |
624 | * request | |
625 | */ | |
626 | mvmvif = NULL; | |
627 | spin_lock_bh(&mvm->time_event_lock); | |
628 | list_for_each_entry(te_data, &mvm->time_event_list, list) { | |
629 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
630 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); | |
631 | break; | |
632 | } | |
633 | } | |
634 | spin_unlock_bh(&mvm->time_event_lock); | |
635 | ||
636 | if (!mvmvif) { | |
637 | IWL_WARN(mvm, "P2P_DEVICE no remain on channel event\n"); | |
638 | return; | |
639 | } | |
640 | ||
641 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
642 | ||
643 | iwl_mvm_roc_finished(mvm); | |
644 | } | |
7f0a7c67 AO |
645 | |
646 | int iwl_mvm_schedule_csa_noa(struct iwl_mvm *mvm, | |
647 | struct ieee80211_vif *vif, | |
648 | u32 duration, u32 apply_time) | |
649 | { | |
650 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
651 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
652 | struct iwl_time_event_cmd time_cmd = {}; | |
653 | ||
654 | lockdep_assert_held(&mvm->mutex); | |
655 | ||
656 | if (te_data->running) { | |
657 | IWL_DEBUG_TE(mvm, "CS NOA is already scheduled\n"); | |
658 | return -EBUSY; | |
659 | } | |
660 | ||
661 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); | |
662 | time_cmd.id_and_color = | |
663 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
664 | time_cmd.id = cpu_to_le32(TE_P2P_GO_CSA_NOA); | |
665 | time_cmd.apply_time = cpu_to_le32(apply_time); | |
666 | time_cmd.max_frags = TE_V2_FRAG_NONE; | |
667 | time_cmd.duration = cpu_to_le32(duration); | |
668 | time_cmd.repeat = 1; | |
669 | time_cmd.interval = cpu_to_le32(1); | |
670 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
671 | TE_V2_ABSENCE); | |
672 | ||
673 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); | |
674 | } |