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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 | ||
75 | /* A TimeUnit is 1024 microsecond */ | |
8ca151b5 JB |
76 | #define MSEC_TO_TU(_msec) (_msec*1000/1024) |
77 | ||
e635c797 IP |
78 | /* |
79 | * For the high priority TE use a time event type that has similar priority to | |
80 | * the FW's action scan priority. | |
456f6ddf | 81 | */ |
e635c797 IP |
82 | #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
83 | #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC | |
456f6ddf | 84 | |
8ca151b5 JB |
85 | void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
86 | struct iwl_mvm_time_event_data *te_data) | |
87 | { | |
88 | lockdep_assert_held(&mvm->time_event_lock); | |
89 | ||
90 | if (te_data->id == TE_MAX) | |
91 | return; | |
92 | ||
93 | list_del(&te_data->list); | |
94 | te_data->running = false; | |
95 | te_data->uid = 0; | |
96 | te_data->id = TE_MAX; | |
97 | te_data->vif = NULL; | |
98 | } | |
99 | ||
100 | void iwl_mvm_roc_done_wk(struct work_struct *wk) | |
101 | { | |
102 | struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); | |
103 | ||
104 | synchronize_net(); | |
105 | ||
106 | /* | |
107 | * Flush the offchannel queue -- this is called when the time | |
108 | * event finishes or is cancelled, so that frames queued for it | |
109 | * won't get stuck on the queue and be transmitted in the next | |
110 | * time event. | |
111 | * We have to send the command asynchronously since this cannot | |
112 | * be under the mutex for locking reasons, but that's not an | |
113 | * issue as it will have to complete before the next command is | |
114 | * executed, and a new time event means a new command. | |
115 | */ | |
398e8c6c | 116 | iwl_mvm_flush_tx_path(mvm, BIT(IWL_MVM_OFFCHANNEL_QUEUE), false); |
8ca151b5 JB |
117 | } |
118 | ||
119 | static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) | |
120 | { | |
121 | /* | |
122 | * First, clear the ROC_RUNNING status bit. This will cause the TX | |
123 | * path to drop offchannel transmissions. That would also be done | |
124 | * by mac80211, but it is racy, in particular in the case that the | |
125 | * time event actually completed in the firmware (which is handled | |
126 | * in iwl_mvm_te_handle_notif). | |
127 | */ | |
128 | clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 129 | iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 JB |
130 | |
131 | /* | |
132 | * Of course, our status bit is just as racy as mac80211, so in | |
133 | * addition, fire off the work struct which will drop all frames | |
134 | * from the hardware queues that made it through the race. First | |
135 | * it will of course synchronize the TX path to make sure that | |
136 | * any *new* TX will be rejected. | |
137 | */ | |
138 | schedule_work(&mvm->roc_done_wk); | |
139 | } | |
140 | ||
05739794 JB |
141 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
142 | struct ieee80211_vif *vif, | |
143 | const char *errmsg) | |
144 | { | |
145 | if (vif->type != NL80211_IFTYPE_STATION) | |
146 | return false; | |
147 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
148 | return false; | |
149 | if (errmsg) | |
150 | IWL_ERR(mvm, "%s\n", errmsg); | |
151 | ieee80211_connection_loss(vif); | |
152 | return true; | |
153 | } | |
154 | ||
8ca151b5 JB |
155 | /* |
156 | * Handles a FW notification for an event that is known to the driver. | |
157 | * | |
158 | * @mvm: the mvm component | |
159 | * @te_data: the time event data | |
160 | * @notif: the notification data corresponding the time event data. | |
161 | */ | |
162 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
163 | struct iwl_mvm_time_event_data *te_data, | |
164 | struct iwl_time_event_notif *notif) | |
165 | { | |
166 | lockdep_assert_held(&mvm->time_event_lock); | |
167 | ||
168 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
169 | le32_to_cpu(notif->unique_id), | |
170 | le32_to_cpu(notif->action)); | |
171 | ||
172 | /* | |
173 | * The FW sends the start/end time event notifications even for events | |
174 | * that it fails to schedule. This is indicated in the status field of | |
175 | * the notification. This happens in cases that the scheduler cannot | |
176 | * find a schedule that can handle the event (for example requesting a | |
177 | * P2P Device discoveribility, while there are other higher priority | |
178 | * events in the system). | |
179 | */ | |
9fc3fe96 EG |
180 | if (!le32_to_cpu(notif->status)) { |
181 | bool start = le32_to_cpu(notif->action) & | |
182 | TE_V2_NOTIF_HOST_EVENT_START; | |
183 | IWL_WARN(mvm, "Time Event %s notification failure\n", | |
184 | start ? "start" : "end"); | |
05739794 JB |
185 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { |
186 | iwl_mvm_te_clear_data(mvm, te_data); | |
187 | return; | |
188 | } | |
189 | } | |
8ca151b5 | 190 | |
f8f03c3e | 191 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
192 | IWL_DEBUG_TE(mvm, |
193 | "TE ended - current time %lu, estimated end %lu\n", | |
194 | jiffies, te_data->end_jiffies); | |
195 | ||
196 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
197 | ieee80211_remain_on_channel_expired(mvm->hw); | |
198 | iwl_mvm_roc_finished(mvm); | |
199 | } | |
200 | ||
201 | /* | |
202 | * By now, we should have finished association | |
203 | * and know the dtim period. | |
204 | */ | |
05739794 | 205 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
2e515bf0 | 206 | "No association and the time event is over already..."); |
8ca151b5 | 207 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 208 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 209 | te_data->running = true; |
e7f1935c | 210 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
211 | |
212 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
213 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
9f45c36d | 214 | iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
8ca151b5 JB |
215 | ieee80211_ready_on_channel(mvm->hw); |
216 | } | |
217 | } else { | |
218 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
219 | } | |
220 | } | |
221 | ||
222 | /* | |
223 | * The Rx handler for time event notifications | |
224 | */ | |
225 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
226 | struct iwl_rx_cmd_buffer *rxb, | |
227 | struct iwl_device_cmd *cmd) | |
228 | { | |
229 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
230 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
231 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
232 | ||
233 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
234 | le32_to_cpu(notif->unique_id), | |
235 | le32_to_cpu(notif->action)); | |
236 | ||
237 | spin_lock_bh(&mvm->time_event_lock); | |
238 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { | |
239 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
240 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
241 | } | |
242 | spin_unlock_bh(&mvm->time_event_lock); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
ffdf968d JB |
247 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
248 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
249 | { |
250 | struct iwl_mvm *mvm = | |
251 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
252 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 253 | struct iwl_time_event_resp *resp; |
65b30348 | 254 | int resp_len = iwl_rx_packet_payload_len(pkt); |
8ca151b5 | 255 | |
ffdf968d JB |
256 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
257 | return true; | |
8ca151b5 | 258 | |
65b30348 | 259 | if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
ffdf968d JB |
260 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
261 | return true; | |
262 | } | |
8ca151b5 | 263 | |
ffdf968d | 264 | resp = (void *)pkt->data; |
e3722822 JB |
265 | |
266 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
267 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
268 | return false; | |
269 | ||
ffdf968d JB |
270 | te_data->uid = le32_to_cpu(resp->unique_id); |
271 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
272 | te_data->uid); | |
273 | return true; | |
274 | } | |
8ca151b5 | 275 | |
ffdf968d JB |
276 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
277 | struct ieee80211_vif *vif, | |
278 | struct iwl_mvm_time_event_data *te_data, | |
a373f67c | 279 | struct iwl_time_event_cmd *te_cmd) |
ffdf968d JB |
280 | { |
281 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
282 | struct iwl_notification_wait wait_time_event; | |
283 | int ret; | |
284 | ||
285 | lockdep_assert_held(&mvm->mutex); | |
286 | ||
93630dc3 JB |
287 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
288 | le32_to_cpu(te_cmd->duration)); | |
289 | ||
ffdf968d JB |
290 | spin_lock_bh(&mvm->time_event_lock); |
291 | if (WARN_ON(te_data->id != TE_MAX)) { | |
292 | spin_unlock_bh(&mvm->time_event_lock); | |
293 | return -EIO; | |
294 | } | |
295 | te_data->vif = vif; | |
296 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
297 | te_data->id = le32_to_cpu(te_cmd->id); | |
298 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
299 | spin_unlock_bh(&mvm->time_event_lock); | |
300 | ||
301 | /* | |
302 | * Use a notification wait, which really just processes the | |
303 | * command response and doesn't wait for anything, in order | |
304 | * to be able to process the response and get the UID inside | |
305 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
306 | * stores the buffer and then wakes up this thread, by which | |
307 | * time another notification (that the time event started) | |
308 | * might already be processed unsuccessfully. | |
309 | */ | |
310 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
311 | time_event_response, | |
312 | ARRAY_SIZE(time_event_response), | |
313 | iwl_mvm_time_event_response, te_data); | |
314 | ||
a373f67c EG |
315 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, CMD_SYNC, |
316 | sizeof(*te_cmd), te_cmd); | |
ffdf968d JB |
317 | if (ret) { |
318 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
319 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
320 | goto out_clear_te; | |
321 | } | |
8ca151b5 | 322 | |
ffdf968d JB |
323 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
324 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
325 | /* should never fail */ | |
326 | WARN_ON_ONCE(ret); | |
327 | ||
328 | if (ret) { | |
329 | out_clear_te: | |
330 | spin_lock_bh(&mvm->time_event_lock); | |
331 | iwl_mvm_te_clear_data(mvm, te_data); | |
332 | spin_unlock_bh(&mvm->time_event_lock); | |
333 | } | |
334 | return ret; | |
8ca151b5 JB |
335 | } |
336 | ||
337 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
338 | struct ieee80211_vif *vif, | |
016d27e1 JB |
339 | u32 duration, u32 min_duration, |
340 | u32 max_delay) | |
8ca151b5 JB |
341 | { |
342 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
343 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 344 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
345 | |
346 | lockdep_assert_held(&mvm->mutex); | |
347 | ||
348 | if (te_data->running && | |
e7f1935c | 349 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
350 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
351 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
352 | return; | |
353 | } | |
354 | ||
355 | if (te_data->running) { | |
356 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
357 | te_data->uid, | |
358 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
359 | /* | |
360 | * we don't have enough time | |
361 | * cancel the current TE and issue a new one | |
362 | * Of course it would be better to remove the old one only | |
363 | * when the new one is added, but we don't care if we are off | |
364 | * channel for a bit. All we need to do, is not to return | |
365 | * before we actually begin to be on the channel. | |
366 | */ | |
367 | iwl_mvm_stop_session_protection(mvm, vif); | |
368 | } | |
369 | ||
8ca151b5 JB |
370 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
371 | time_cmd.id_and_color = | |
372 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
373 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
374 | ||
375 | time_cmd.apply_time = | |
376 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 377 | |
f8f03c3e | 378 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 379 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
380 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
381 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 382 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
383 | time_cmd.repeat = 1; |
384 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
385 | TE_V2_NOTIF_HOST_EVENT_END | |
386 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 387 | |
ffdf968d | 388 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
389 | } |
390 | ||
391 | /* | |
392 | * Explicit request to remove a time event. The removal of a time event needs to | |
393 | * be synchronized with the flow of a time event's end notification, which also | |
394 | * removes the time event from the op mode data structures. | |
395 | */ | |
396 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
397 | struct iwl_mvm_vif *mvmvif, | |
398 | struct iwl_mvm_time_event_data *te_data) | |
399 | { | |
a373f67c | 400 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
401 | u32 id, uid; |
402 | int ret; | |
403 | ||
404 | /* | |
405 | * It is possible that by the time we got to this point the time | |
406 | * event was already removed. | |
407 | */ | |
408 | spin_lock_bh(&mvm->time_event_lock); | |
409 | ||
410 | /* Save time event uid before clearing its data */ | |
411 | uid = te_data->uid; | |
412 | id = te_data->id; | |
413 | ||
414 | /* | |
415 | * The clear_data function handles time events that were already removed | |
416 | */ | |
417 | iwl_mvm_te_clear_data(mvm, te_data); | |
418 | spin_unlock_bh(&mvm->time_event_lock); | |
419 | ||
420 | /* | |
421 | * It is possible that by the time we try to remove it, the time event | |
422 | * has already ended and removed. In such a case there is no need to | |
423 | * send a removal command. | |
424 | */ | |
425 | if (id == TE_MAX) { | |
426 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", uid); | |
427 | return; | |
428 | } | |
429 | ||
430 | /* When we remove a TE, the UID is to be set in the id field */ | |
431 | time_cmd.id = cpu_to_le32(uid); | |
432 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
433 | time_cmd.id_and_color = | |
434 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
435 | ||
436 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
a373f67c EG |
437 | ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, CMD_SYNC, |
438 | sizeof(time_cmd), &time_cmd); | |
8ca151b5 JB |
439 | if (WARN_ON(ret)) |
440 | return; | |
441 | } | |
442 | ||
443 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
444 | struct ieee80211_vif *vif) | |
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; | |
448 | ||
449 | lockdep_assert_held(&mvm->mutex); | |
450 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
451 | } | |
452 | ||
8ca151b5 | 453 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 454 | int duration, enum ieee80211_roc_type type) |
8ca151b5 JB |
455 | { |
456 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
457 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
a373f67c | 458 | struct iwl_time_event_cmd time_cmd = {}; |
8ca151b5 JB |
459 | |
460 | lockdep_assert_held(&mvm->mutex); | |
461 | if (te_data->running) { | |
462 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
463 | return -EBUSY; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Flush the done work, just in case it's still pending, so that | |
468 | * the work it does can complete and we can accept new frames. | |
469 | */ | |
470 | flush_work(&mvm->roc_done_wk); | |
471 | ||
8ca151b5 JB |
472 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
473 | time_cmd.id_and_color = | |
474 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
475 | |
476 | switch (type) { | |
477 | case IEEE80211_ROC_TYPE_NORMAL: | |
478 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
479 | break; | |
480 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
481 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
482 | break; | |
483 | default: | |
484 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
485 | return -EINVAL; | |
486 | } | |
8ca151b5 JB |
487 | |
488 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
489 | time_cmd.interval = cpu_to_le32(1); |
490 | ||
491 | /* | |
e635c797 | 492 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 493 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
494 | * scheduled. To improve the chances of it being scheduled, allow them |
495 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 496 | */ |
f8f03c3e | 497 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
498 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
499 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
500 | time_cmd.repeat = 1; |
501 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
1f6bf078 EG |
502 | TE_V2_NOTIF_HOST_EVENT_END | |
503 | T2_V2_START_IMMEDIATELY); | |
8ca151b5 | 504 | |
ffdf968d | 505 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
506 | } |
507 | ||
508 | void iwl_mvm_stop_p2p_roc(struct iwl_mvm *mvm) | |
509 | { | |
510 | struct iwl_mvm_vif *mvmvif; | |
511 | struct iwl_mvm_time_event_data *te_data; | |
512 | ||
513 | lockdep_assert_held(&mvm->mutex); | |
514 | ||
515 | /* | |
516 | * Iterate over the list of time events and find the time event that is | |
517 | * associated with a P2P_DEVICE interface. | |
518 | * This assumes that a P2P_DEVICE interface can have only a single time | |
519 | * event at any given time and this time event coresponds to a ROC | |
520 | * request | |
521 | */ | |
522 | mvmvif = NULL; | |
523 | spin_lock_bh(&mvm->time_event_lock); | |
524 | list_for_each_entry(te_data, &mvm->time_event_list, list) { | |
525 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
526 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); | |
527 | break; | |
528 | } | |
529 | } | |
530 | spin_unlock_bh(&mvm->time_event_lock); | |
531 | ||
532 | if (!mvmvif) { | |
533 | IWL_WARN(mvm, "P2P_DEVICE no remain on channel event\n"); | |
534 | return; | |
535 | } | |
536 | ||
537 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
538 | ||
539 | iwl_mvm_roc_finished(mvm); | |
540 | } |