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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 | * | |
8 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
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 | * | |
33 | * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. | |
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); | |
129 | ||
130 | /* | |
131 | * Of course, our status bit is just as racy as mac80211, so in | |
132 | * addition, fire off the work struct which will drop all frames | |
133 | * from the hardware queues that made it through the race. First | |
134 | * it will of course synchronize the TX path to make sure that | |
135 | * any *new* TX will be rejected. | |
136 | */ | |
137 | schedule_work(&mvm->roc_done_wk); | |
138 | } | |
139 | ||
05739794 JB |
140 | static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
141 | struct ieee80211_vif *vif, | |
142 | const char *errmsg) | |
143 | { | |
144 | if (vif->type != NL80211_IFTYPE_STATION) | |
145 | return false; | |
146 | if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) | |
147 | return false; | |
148 | if (errmsg) | |
149 | IWL_ERR(mvm, "%s\n", errmsg); | |
150 | ieee80211_connection_loss(vif); | |
151 | return true; | |
152 | } | |
153 | ||
8ca151b5 JB |
154 | /* |
155 | * Handles a FW notification for an event that is known to the driver. | |
156 | * | |
157 | * @mvm: the mvm component | |
158 | * @te_data: the time event data | |
159 | * @notif: the notification data corresponding the time event data. | |
160 | */ | |
161 | static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, | |
162 | struct iwl_mvm_time_event_data *te_data, | |
163 | struct iwl_time_event_notif *notif) | |
164 | { | |
165 | lockdep_assert_held(&mvm->time_event_lock); | |
166 | ||
167 | IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", | |
168 | le32_to_cpu(notif->unique_id), | |
169 | le32_to_cpu(notif->action)); | |
170 | ||
171 | /* | |
172 | * The FW sends the start/end time event notifications even for events | |
173 | * that it fails to schedule. This is indicated in the status field of | |
174 | * the notification. This happens in cases that the scheduler cannot | |
175 | * find a schedule that can handle the event (for example requesting a | |
176 | * P2P Device discoveribility, while there are other higher priority | |
177 | * events in the system). | |
178 | */ | |
05739794 JB |
179 | if (WARN_ONCE(!le32_to_cpu(notif->status), |
180 | "Failed to schedule time event\n")) { | |
181 | if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, NULL)) { | |
182 | iwl_mvm_te_clear_data(mvm, te_data); | |
183 | return; | |
184 | } | |
185 | } | |
8ca151b5 | 186 | |
f8f03c3e | 187 | if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
8ca151b5 JB |
188 | IWL_DEBUG_TE(mvm, |
189 | "TE ended - current time %lu, estimated end %lu\n", | |
190 | jiffies, te_data->end_jiffies); | |
191 | ||
192 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
193 | ieee80211_remain_on_channel_expired(mvm->hw); | |
194 | iwl_mvm_roc_finished(mvm); | |
195 | } | |
196 | ||
197 | /* | |
198 | * By now, we should have finished association | |
199 | * and know the dtim period. | |
200 | */ | |
05739794 | 201 | iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
2e515bf0 | 202 | "No association and the time event is over already..."); |
8ca151b5 | 203 | iwl_mvm_te_clear_data(mvm, te_data); |
f8f03c3e | 204 | } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
8ca151b5 | 205 | te_data->running = true; |
e7f1935c | 206 | te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
8ca151b5 JB |
207 | |
208 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
209 | set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); | |
210 | ieee80211_ready_on_channel(mvm->hw); | |
211 | } | |
212 | } else { | |
213 | IWL_WARN(mvm, "Got TE with unknown action\n"); | |
214 | } | |
215 | } | |
216 | ||
217 | /* | |
218 | * The Rx handler for time event notifications | |
219 | */ | |
220 | int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, | |
221 | struct iwl_rx_cmd_buffer *rxb, | |
222 | struct iwl_device_cmd *cmd) | |
223 | { | |
224 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
225 | struct iwl_time_event_notif *notif = (void *)pkt->data; | |
226 | struct iwl_mvm_time_event_data *te_data, *tmp; | |
227 | ||
228 | IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", | |
229 | le32_to_cpu(notif->unique_id), | |
230 | le32_to_cpu(notif->action)); | |
231 | ||
232 | spin_lock_bh(&mvm->time_event_lock); | |
233 | list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { | |
234 | if (le32_to_cpu(notif->unique_id) == te_data->uid) | |
235 | iwl_mvm_te_handle_notif(mvm, te_data, notif); | |
236 | } | |
237 | spin_unlock_bh(&mvm->time_event_lock); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
ffdf968d JB |
242 | static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
243 | struct iwl_rx_packet *pkt, void *data) | |
8ca151b5 JB |
244 | { |
245 | struct iwl_mvm *mvm = | |
246 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
247 | struct iwl_mvm_time_event_data *te_data = data; | |
8ca151b5 | 248 | struct iwl_time_event_resp *resp; |
ffdf968d | 249 | int resp_len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; |
8ca151b5 | 250 | |
ffdf968d JB |
251 | if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
252 | return true; | |
8ca151b5 | 253 | |
ffdf968d JB |
254 | if (WARN_ON_ONCE(resp_len != sizeof(pkt->hdr) + sizeof(*resp))) { |
255 | IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); | |
256 | return true; | |
257 | } | |
8ca151b5 | 258 | |
ffdf968d | 259 | resp = (void *)pkt->data; |
e3722822 JB |
260 | |
261 | /* we should never get a response to another TIME_EVENT_CMD here */ | |
262 | if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) | |
263 | return false; | |
264 | ||
ffdf968d JB |
265 | te_data->uid = le32_to_cpu(resp->unique_id); |
266 | IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", | |
267 | te_data->uid); | |
268 | return true; | |
269 | } | |
8ca151b5 | 270 | |
f8f03c3e EL |
271 | /* used to convert from time event API v2 to v1 */ |
272 | #define TE_V2_DEP_POLICY_MSK (TE_V2_DEP_OTHER | TE_V2_DEP_TSF |\ | |
273 | TE_V2_EVENT_SOCIOPATHIC) | |
274 | static inline u16 te_v2_get_notify(__le16 policy) | |
275 | { | |
276 | return le16_to_cpu(policy) & TE_V2_NOTIF_MSK; | |
277 | } | |
278 | ||
279 | static inline u16 te_v2_get_dep_policy(__le16 policy) | |
280 | { | |
281 | return (le16_to_cpu(policy) & TE_V2_DEP_POLICY_MSK) >> | |
282 | TE_V2_PLACEMENT_POS; | |
283 | } | |
284 | ||
285 | static inline u16 te_v2_get_absence(__le16 policy) | |
286 | { | |
287 | return (le16_to_cpu(policy) & TE_V2_ABSENCE) >> TE_V2_ABSENCE_POS; | |
288 | } | |
289 | ||
290 | static void iwl_mvm_te_v2_to_v1(const struct iwl_time_event_cmd_v2 *cmd_v2, | |
291 | struct iwl_time_event_cmd_v1 *cmd_v1) | |
292 | { | |
293 | cmd_v1->id_and_color = cmd_v2->id_and_color; | |
294 | cmd_v1->action = cmd_v2->action; | |
295 | cmd_v1->id = cmd_v2->id; | |
296 | cmd_v1->apply_time = cmd_v2->apply_time; | |
297 | cmd_v1->max_delay = cmd_v2->max_delay; | |
298 | cmd_v1->depends_on = cmd_v2->depends_on; | |
299 | cmd_v1->interval = cmd_v2->interval; | |
300 | cmd_v1->duration = cmd_v2->duration; | |
301 | if (cmd_v2->repeat == TE_V2_REPEAT_ENDLESS) | |
302 | cmd_v1->repeat = cpu_to_le32(TE_V1_REPEAT_ENDLESS); | |
303 | else | |
304 | cmd_v1->repeat = cpu_to_le32(cmd_v2->repeat); | |
305 | cmd_v1->max_frags = cpu_to_le32(cmd_v2->max_frags); | |
306 | cmd_v1->interval_reciprocal = 0; /* unused */ | |
307 | ||
308 | cmd_v1->dep_policy = cpu_to_le32(te_v2_get_dep_policy(cmd_v2->policy)); | |
309 | cmd_v1->is_present = cpu_to_le32(!te_v2_get_absence(cmd_v2->policy)); | |
310 | cmd_v1->notify = cpu_to_le32(te_v2_get_notify(cmd_v2->policy)); | |
311 | } | |
312 | ||
313 | static int iwl_mvm_send_time_event_cmd(struct iwl_mvm *mvm, | |
314 | const struct iwl_time_event_cmd_v2 *cmd) | |
315 | { | |
316 | struct iwl_time_event_cmd_v1 cmd_v1; | |
317 | ||
318 | if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_TIME_EVENT_API_V2) | |
319 | return iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, CMD_SYNC, | |
320 | sizeof(*cmd), cmd); | |
321 | ||
322 | iwl_mvm_te_v2_to_v1(cmd, &cmd_v1); | |
323 | return iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, CMD_SYNC, | |
324 | sizeof(cmd_v1), &cmd_v1); | |
325 | } | |
326 | ||
327 | ||
ffdf968d JB |
328 | static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
329 | struct ieee80211_vif *vif, | |
330 | struct iwl_mvm_time_event_data *te_data, | |
f8f03c3e | 331 | struct iwl_time_event_cmd_v2 *te_cmd) |
ffdf968d JB |
332 | { |
333 | static const u8 time_event_response[] = { TIME_EVENT_CMD }; | |
334 | struct iwl_notification_wait wait_time_event; | |
335 | int ret; | |
336 | ||
337 | lockdep_assert_held(&mvm->mutex); | |
338 | ||
93630dc3 JB |
339 | IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
340 | le32_to_cpu(te_cmd->duration)); | |
341 | ||
ffdf968d JB |
342 | spin_lock_bh(&mvm->time_event_lock); |
343 | if (WARN_ON(te_data->id != TE_MAX)) { | |
344 | spin_unlock_bh(&mvm->time_event_lock); | |
345 | return -EIO; | |
346 | } | |
347 | te_data->vif = vif; | |
348 | te_data->duration = le32_to_cpu(te_cmd->duration); | |
349 | te_data->id = le32_to_cpu(te_cmd->id); | |
350 | list_add_tail(&te_data->list, &mvm->time_event_list); | |
351 | spin_unlock_bh(&mvm->time_event_lock); | |
352 | ||
353 | /* | |
354 | * Use a notification wait, which really just processes the | |
355 | * command response and doesn't wait for anything, in order | |
356 | * to be able to process the response and get the UID inside | |
357 | * the RX path. Using CMD_WANT_SKB doesn't work because it | |
358 | * stores the buffer and then wakes up this thread, by which | |
359 | * time another notification (that the time event started) | |
360 | * might already be processed unsuccessfully. | |
361 | */ | |
362 | iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, | |
363 | time_event_response, | |
364 | ARRAY_SIZE(time_event_response), | |
365 | iwl_mvm_time_event_response, te_data); | |
366 | ||
f8f03c3e | 367 | ret = iwl_mvm_send_time_event_cmd(mvm, te_cmd); |
ffdf968d JB |
368 | if (ret) { |
369 | IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); | |
370 | iwl_remove_notification(&mvm->notif_wait, &wait_time_event); | |
371 | goto out_clear_te; | |
372 | } | |
8ca151b5 | 373 | |
ffdf968d JB |
374 | /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
375 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); | |
376 | /* should never fail */ | |
377 | WARN_ON_ONCE(ret); | |
378 | ||
379 | if (ret) { | |
380 | out_clear_te: | |
381 | spin_lock_bh(&mvm->time_event_lock); | |
382 | iwl_mvm_te_clear_data(mvm, te_data); | |
383 | spin_unlock_bh(&mvm->time_event_lock); | |
384 | } | |
385 | return ret; | |
8ca151b5 JB |
386 | } |
387 | ||
388 | void iwl_mvm_protect_session(struct iwl_mvm *mvm, | |
389 | struct ieee80211_vif *vif, | |
016d27e1 JB |
390 | u32 duration, u32 min_duration, |
391 | u32 max_delay) | |
8ca151b5 JB |
392 | { |
393 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
394 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
f8f03c3e | 395 | struct iwl_time_event_cmd_v2 time_cmd = {}; |
8ca151b5 JB |
396 | |
397 | lockdep_assert_held(&mvm->mutex); | |
398 | ||
399 | if (te_data->running && | |
e7f1935c | 400 | time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
8ca151b5 JB |
401 | IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
402 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
403 | return; | |
404 | } | |
405 | ||
406 | if (te_data->running) { | |
407 | IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", | |
408 | te_data->uid, | |
409 | jiffies_to_msecs(te_data->end_jiffies - jiffies)); | |
410 | /* | |
411 | * we don't have enough time | |
412 | * cancel the current TE and issue a new one | |
413 | * Of course it would be better to remove the old one only | |
414 | * when the new one is added, but we don't care if we are off | |
415 | * channel for a bit. All we need to do, is not to return | |
416 | * before we actually begin to be on the channel. | |
417 | */ | |
418 | iwl_mvm_stop_session_protection(mvm, vif); | |
419 | } | |
420 | ||
8ca151b5 JB |
421 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
422 | time_cmd.id_and_color = | |
423 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
424 | time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); | |
425 | ||
426 | time_cmd.apply_time = | |
427 | cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); | |
ffdf968d | 428 | |
f8f03c3e | 429 | time_cmd.max_frags = TE_V2_FRAG_NONE; |
016d27e1 | 430 | time_cmd.max_delay = cpu_to_le32(max_delay); |
8ca151b5 JB |
431 | /* TODO: why do we need to interval = bi if it is not periodic? */ |
432 | time_cmd.interval = cpu_to_le32(1); | |
8ca151b5 | 433 | time_cmd.duration = cpu_to_le32(duration); |
f8f03c3e EL |
434 | time_cmd.repeat = 1; |
435 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
436 | TE_V2_NOTIF_HOST_EVENT_END); | |
8ca151b5 | 437 | |
ffdf968d | 438 | iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
439 | } |
440 | ||
441 | /* | |
442 | * Explicit request to remove a time event. The removal of a time event needs to | |
443 | * be synchronized with the flow of a time event's end notification, which also | |
444 | * removes the time event from the op mode data structures. | |
445 | */ | |
446 | void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, | |
447 | struct iwl_mvm_vif *mvmvif, | |
448 | struct iwl_mvm_time_event_data *te_data) | |
449 | { | |
f8f03c3e | 450 | struct iwl_time_event_cmd_v2 time_cmd = {}; |
8ca151b5 JB |
451 | u32 id, uid; |
452 | int ret; | |
453 | ||
454 | /* | |
455 | * It is possible that by the time we got to this point the time | |
456 | * event was already removed. | |
457 | */ | |
458 | spin_lock_bh(&mvm->time_event_lock); | |
459 | ||
460 | /* Save time event uid before clearing its data */ | |
461 | uid = te_data->uid; | |
462 | id = te_data->id; | |
463 | ||
464 | /* | |
465 | * The clear_data function handles time events that were already removed | |
466 | */ | |
467 | iwl_mvm_te_clear_data(mvm, te_data); | |
468 | spin_unlock_bh(&mvm->time_event_lock); | |
469 | ||
470 | /* | |
471 | * It is possible that by the time we try to remove it, the time event | |
472 | * has already ended and removed. In such a case there is no need to | |
473 | * send a removal command. | |
474 | */ | |
475 | if (id == TE_MAX) { | |
476 | IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", uid); | |
477 | return; | |
478 | } | |
479 | ||
480 | /* When we remove a TE, the UID is to be set in the id field */ | |
481 | time_cmd.id = cpu_to_le32(uid); | |
482 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); | |
483 | time_cmd.id_and_color = | |
484 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
485 | ||
486 | IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); | |
f8f03c3e | 487 | ret = iwl_mvm_send_time_event_cmd(mvm, &time_cmd); |
8ca151b5 JB |
488 | if (WARN_ON(ret)) |
489 | return; | |
490 | } | |
491 | ||
492 | void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, | |
493 | struct ieee80211_vif *vif) | |
494 | { | |
495 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
496 | struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; | |
497 | ||
498 | lockdep_assert_held(&mvm->mutex); | |
499 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
500 | } | |
501 | ||
8ca151b5 | 502 | int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
e635c797 | 503 | int duration, enum ieee80211_roc_type type) |
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; | |
f8f03c3e | 507 | struct iwl_time_event_cmd_v2 time_cmd = {}; |
8ca151b5 JB |
508 | |
509 | lockdep_assert_held(&mvm->mutex); | |
510 | if (te_data->running) { | |
511 | IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); | |
512 | return -EBUSY; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Flush the done work, just in case it's still pending, so that | |
517 | * the work it does can complete and we can accept new frames. | |
518 | */ | |
519 | flush_work(&mvm->roc_done_wk); | |
520 | ||
8ca151b5 JB |
521 | time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
522 | time_cmd.id_and_color = | |
523 | cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); | |
e635c797 IP |
524 | |
525 | switch (type) { | |
526 | case IEEE80211_ROC_TYPE_NORMAL: | |
527 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); | |
528 | break; | |
529 | case IEEE80211_ROC_TYPE_MGMT_TX: | |
530 | time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); | |
531 | break; | |
532 | default: | |
533 | WARN_ONCE(1, "Got an invalid ROC type\n"); | |
534 | return -EINVAL; | |
535 | } | |
8ca151b5 JB |
536 | |
537 | time_cmd.apply_time = cpu_to_le32(0); | |
8ca151b5 JB |
538 | time_cmd.interval = cpu_to_le32(1); |
539 | ||
540 | /* | |
e635c797 | 541 | * The P2P Device TEs can have lower priority than other events |
8ca151b5 | 542 | * that are being scheduled by the driver/fw, and thus it might not be |
e635c797 IP |
543 | * scheduled. To improve the chances of it being scheduled, allow them |
544 | * to be fragmented, and in addition allow them to be delayed. | |
8ca151b5 | 545 | */ |
f8f03c3e | 546 | time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
8ca151b5 JB |
547 | time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
548 | time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); | |
f8f03c3e EL |
549 | time_cmd.repeat = 1; |
550 | time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | | |
551 | TE_V2_NOTIF_HOST_EVENT_END); | |
8ca151b5 | 552 | |
ffdf968d | 553 | return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
8ca151b5 JB |
554 | } |
555 | ||
556 | void iwl_mvm_stop_p2p_roc(struct iwl_mvm *mvm) | |
557 | { | |
558 | struct iwl_mvm_vif *mvmvif; | |
559 | struct iwl_mvm_time_event_data *te_data; | |
560 | ||
561 | lockdep_assert_held(&mvm->mutex); | |
562 | ||
563 | /* | |
564 | * Iterate over the list of time events and find the time event that is | |
565 | * associated with a P2P_DEVICE interface. | |
566 | * This assumes that a P2P_DEVICE interface can have only a single time | |
567 | * event at any given time and this time event coresponds to a ROC | |
568 | * request | |
569 | */ | |
570 | mvmvif = NULL; | |
571 | spin_lock_bh(&mvm->time_event_lock); | |
572 | list_for_each_entry(te_data, &mvm->time_event_list, list) { | |
573 | if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { | |
574 | mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); | |
575 | break; | |
576 | } | |
577 | } | |
578 | spin_unlock_bh(&mvm->time_event_lock); | |
579 | ||
580 | if (!mvmvif) { | |
581 | IWL_WARN(mvm, "P2P_DEVICE no remain on channel event\n"); | |
582 | return; | |
583 | } | |
584 | ||
585 | iwl_mvm_remove_time_event(mvm, mvmvif, te_data); | |
586 | ||
587 | iwl_mvm_roc_finished(mvm); | |
588 | } |