Commit | Line | Data |
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3f52b7e3 MP |
1 | /* |
2 | * Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de> | |
3 | * Copyright 2012-2013, cozybit Inc. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include "mesh.h" | |
11 | #include "wme.h" | |
12 | ||
13 | ||
14 | /* mesh PS management */ | |
15 | ||
16 | /** | |
17 | * mps_qos_null_get - create pre-addressed QoS Null frame for mesh powersave | |
18 | */ | |
19 | static struct sk_buff *mps_qos_null_get(struct sta_info *sta) | |
20 | { | |
21 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
22 | struct ieee80211_local *local = sdata->local; | |
23 | struct ieee80211_hdr *nullfunc; /* use 4addr header */ | |
24 | struct sk_buff *skb; | |
25 | int size = sizeof(*nullfunc); | |
26 | __le16 fc; | |
27 | ||
28 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size + 2); | |
29 | if (!skb) | |
30 | return NULL; | |
31 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
32 | ||
33 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, size); | |
34 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC); | |
35 | ieee80211_fill_mesh_addresses(nullfunc, &fc, sta->sta.addr, | |
36 | sdata->vif.addr); | |
37 | nullfunc->frame_control = fc; | |
38 | nullfunc->duration_id = 0; | |
864a6040 | 39 | nullfunc->seq_ctrl = 0; |
3f52b7e3 MP |
40 | /* no address resolution for this frame -> set addr 1 immediately */ |
41 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
42 | memset(skb_put(skb, 2), 0, 2); /* append QoS control field */ | |
43 | ieee80211_mps_set_frame_flags(sdata, sta, nullfunc); | |
44 | ||
45 | return skb; | |
46 | } | |
47 | ||
48 | /** | |
49 | * mps_qos_null_tx - send a QoS Null to indicate link-specific power mode | |
50 | */ | |
51 | static void mps_qos_null_tx(struct sta_info *sta) | |
52 | { | |
53 | struct sk_buff *skb; | |
54 | ||
55 | skb = mps_qos_null_get(sta); | |
56 | if (!skb) | |
57 | return; | |
58 | ||
59 | mps_dbg(sta->sdata, "announcing peer-specific power mode to %pM\n", | |
60 | sta->sta.addr); | |
61 | ||
62 | /* don't unintentionally start a MPSP */ | |
63 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
64 | u8 *qc = ieee80211_get_qos_ctl((void *) skb->data); | |
65 | ||
66 | qc[0] |= IEEE80211_QOS_CTL_EOSP; | |
67 | } | |
68 | ||
69 | ieee80211_tx_skb(sta->sdata, skb); | |
70 | } | |
71 | ||
72 | /** | |
73 | * ieee80211_mps_local_status_update - track status of local link-specific PMs | |
74 | * | |
75 | * @sdata: local mesh subif | |
76 | * | |
77 | * sets the non-peer power mode and triggers the driver PS (re-)configuration | |
39886b61 | 78 | * Return BSS_CHANGED_BEACON if a beacon update is necessary. |
3f52b7e3 | 79 | */ |
39886b61 | 80 | u32 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata) |
3f52b7e3 MP |
81 | { |
82 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
83 | struct sta_info *sta; | |
84 | bool peering = false; | |
85 | int light_sleep_cnt = 0; | |
86 | int deep_sleep_cnt = 0; | |
39886b61 TP |
87 | u32 changed = 0; |
88 | enum nl80211_mesh_power_mode nonpeer_pm; | |
3f52b7e3 MP |
89 | |
90 | rcu_read_lock(); | |
91 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
92 | if (sdata != sta->sdata) | |
93 | continue; | |
94 | ||
433f5bc1 | 95 | switch (sta->mesh->plink_state) { |
3f52b7e3 MP |
96 | case NL80211_PLINK_OPN_SNT: |
97 | case NL80211_PLINK_OPN_RCVD: | |
98 | case NL80211_PLINK_CNF_RCVD: | |
99 | peering = true; | |
100 | break; | |
101 | case NL80211_PLINK_ESTAB: | |
433f5bc1 | 102 | if (sta->mesh->local_pm == NL80211_MESH_POWER_LIGHT_SLEEP) |
3f52b7e3 | 103 | light_sleep_cnt++; |
433f5bc1 | 104 | else if (sta->mesh->local_pm == NL80211_MESH_POWER_DEEP_SLEEP) |
3f52b7e3 MP |
105 | deep_sleep_cnt++; |
106 | break; | |
107 | default: | |
108 | break; | |
109 | } | |
110 | } | |
111 | rcu_read_unlock(); | |
112 | ||
113 | /* | |
114 | * Set non-peer mode to active during peering/scanning/authentication | |
115 | * (see IEEE802.11-2012 13.14.8.3). The non-peer mesh power mode is | |
116 | * deep sleep if the local STA is in light or deep sleep towards at | |
117 | * least one mesh peer (see 13.14.3.1). Otherwise, set it to the | |
118 | * user-configured default value. | |
119 | */ | |
120 | if (peering) { | |
121 | mps_dbg(sdata, "setting non-peer PM to active for peering\n"); | |
39886b61 | 122 | nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
3f52b7e3 MP |
123 | } else if (light_sleep_cnt || deep_sleep_cnt) { |
124 | mps_dbg(sdata, "setting non-peer PM to deep sleep\n"); | |
39886b61 | 125 | nonpeer_pm = NL80211_MESH_POWER_DEEP_SLEEP; |
3f52b7e3 MP |
126 | } else { |
127 | mps_dbg(sdata, "setting non-peer PM to user value\n"); | |
39886b61 | 128 | nonpeer_pm = ifmsh->mshcfg.power_mode; |
3f52b7e3 MP |
129 | } |
130 | ||
39886b61 TP |
131 | /* need update if sleep counts move between 0 and non-zero */ |
132 | if (ifmsh->nonpeer_pm != nonpeer_pm || | |
133 | !ifmsh->ps_peers_light_sleep != !light_sleep_cnt || | |
134 | !ifmsh->ps_peers_deep_sleep != !deep_sleep_cnt) | |
135 | changed = BSS_CHANGED_BEACON; | |
136 | ||
137 | ifmsh->nonpeer_pm = nonpeer_pm; | |
3f52b7e3 MP |
138 | ifmsh->ps_peers_light_sleep = light_sleep_cnt; |
139 | ifmsh->ps_peers_deep_sleep = deep_sleep_cnt; | |
39886b61 TP |
140 | |
141 | return changed; | |
3f52b7e3 MP |
142 | } |
143 | ||
144 | /** | |
145 | * ieee80211_mps_set_sta_local_pm - set local PM towards a mesh STA | |
146 | * | |
147 | * @sta: mesh STA | |
148 | * @pm: the power mode to set | |
39886b61 | 149 | * Return BSS_CHANGED_BEACON if a beacon update is in order. |
3f52b7e3 | 150 | */ |
39886b61 TP |
151 | u32 ieee80211_mps_set_sta_local_pm(struct sta_info *sta, |
152 | enum nl80211_mesh_power_mode pm) | |
3f52b7e3 MP |
153 | { |
154 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
155 | ||
433f5bc1 | 156 | if (sta->mesh->local_pm == pm) |
446075d7 MP |
157 | return 0; |
158 | ||
3f52b7e3 MP |
159 | mps_dbg(sdata, "local STA operates in mode %d with %pM\n", |
160 | pm, sta->sta.addr); | |
161 | ||
433f5bc1 | 162 | sta->mesh->local_pm = pm; |
3f52b7e3 MP |
163 | |
164 | /* | |
165 | * announce peer-specific power mode transition | |
166 | * (see IEEE802.11-2012 13.14.3.2 and 13.14.3.3) | |
167 | */ | |
433f5bc1 | 168 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 MP |
169 | mps_qos_null_tx(sta); |
170 | ||
39886b61 | 171 | return ieee80211_mps_local_status_update(sdata); |
3f52b7e3 MP |
172 | } |
173 | ||
174 | /** | |
175 | * ieee80211_mps_set_frame_flags - set mesh PS flags in FC (and QoS Control) | |
176 | * | |
177 | * @sdata: local mesh subif | |
178 | * @sta: mesh STA | |
179 | * @hdr: 802.11 frame header | |
180 | * | |
181 | * see IEEE802.11-2012 8.2.4.1.7 and 8.2.4.5.11 | |
182 | * | |
183 | * NOTE: sta must be given when an individually-addressed QoS frame header | |
184 | * is handled, for group-addressed and management frames it is not used | |
185 | */ | |
186 | void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata, | |
187 | struct sta_info *sta, | |
188 | struct ieee80211_hdr *hdr) | |
189 | { | |
190 | enum nl80211_mesh_power_mode pm; | |
191 | u8 *qc; | |
192 | ||
193 | if (WARN_ON(is_unicast_ether_addr(hdr->addr1) && | |
194 | ieee80211_is_data_qos(hdr->frame_control) && | |
195 | !sta)) | |
196 | return; | |
197 | ||
198 | if (is_unicast_ether_addr(hdr->addr1) && | |
199 | ieee80211_is_data_qos(hdr->frame_control) && | |
433f5bc1 JB |
200 | sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
201 | pm = sta->mesh->local_pm; | |
3f52b7e3 MP |
202 | else |
203 | pm = sdata->u.mesh.nonpeer_pm; | |
204 | ||
205 | if (pm == NL80211_MESH_POWER_ACTIVE) | |
206 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_PM); | |
207 | else | |
208 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
209 | ||
210 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
211 | return; | |
212 | ||
213 | qc = ieee80211_get_qos_ctl(hdr); | |
214 | ||
215 | if ((is_unicast_ether_addr(hdr->addr1) && | |
216 | pm == NL80211_MESH_POWER_DEEP_SLEEP) || | |
217 | (is_multicast_ether_addr(hdr->addr1) && | |
218 | sdata->u.mesh.ps_peers_deep_sleep > 0)) | |
219 | qc[1] |= (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8); | |
220 | else | |
221 | qc[1] &= ~(IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8); | |
222 | } | |
223 | ||
224 | /** | |
225 | * ieee80211_mps_sta_status_update - update buffering status of neighbor STA | |
226 | * | |
227 | * @sta: mesh STA | |
228 | * | |
229 | * called after change of peering status or non-peer/peer-specific power mode | |
230 | */ | |
231 | void ieee80211_mps_sta_status_update(struct sta_info *sta) | |
232 | { | |
233 | enum nl80211_mesh_power_mode pm; | |
234 | bool do_buffer; | |
235 | ||
40d18ff9 CYY |
236 | /* For non-assoc STA, prevent buffering or frame transmission */ |
237 | if (sta->sta_state < IEEE80211_STA_ASSOC) | |
238 | return; | |
239 | ||
3f52b7e3 MP |
240 | /* |
241 | * use peer-specific power mode if peering is established and the | |
242 | * peer's power mode is known | |
243 | */ | |
433f5bc1 JB |
244 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB && |
245 | sta->mesh->peer_pm != NL80211_MESH_POWER_UNKNOWN) | |
246 | pm = sta->mesh->peer_pm; | |
3f52b7e3 | 247 | else |
433f5bc1 | 248 | pm = sta->mesh->nonpeer_pm; |
3f52b7e3 MP |
249 | |
250 | do_buffer = (pm != NL80211_MESH_POWER_ACTIVE); | |
251 | ||
446075d7 | 252 | /* clear the MPSP flags for non-peers or active STA */ |
433f5bc1 | 253 | if (sta->mesh->plink_state != NL80211_PLINK_ESTAB) { |
446075d7 MP |
254 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); |
255 | clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
256 | } else if (!do_buffer) { | |
257 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); | |
258 | } | |
259 | ||
3f52b7e3 MP |
260 | /* Don't let the same PS state be set twice */ |
261 | if (test_sta_flag(sta, WLAN_STA_PS_STA) == do_buffer) | |
262 | return; | |
263 | ||
264 | if (do_buffer) { | |
265 | set_sta_flag(sta, WLAN_STA_PS_STA); | |
266 | atomic_inc(&sta->sdata->u.mesh.ps.num_sta_ps); | |
267 | mps_dbg(sta->sdata, "start PS buffering frames towards %pM\n", | |
268 | sta->sta.addr); | |
269 | } else { | |
270 | ieee80211_sta_ps_deliver_wakeup(sta); | |
271 | } | |
3f52b7e3 MP |
272 | } |
273 | ||
274 | static void mps_set_sta_peer_pm(struct sta_info *sta, | |
275 | struct ieee80211_hdr *hdr) | |
276 | { | |
277 | enum nl80211_mesh_power_mode pm; | |
278 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
279 | ||
280 | /* | |
281 | * Test Power Management field of frame control (PW) and | |
282 | * mesh power save level subfield of QoS control field (PSL) | |
283 | * | |
284 | * | PM | PSL| Mesh PM | | |
285 | * +----+----+---------+ | |
286 | * | 0 |Rsrv| Active | | |
287 | * | 1 | 0 | Light | | |
288 | * | 1 | 1 | Deep | | |
289 | */ | |
290 | if (ieee80211_has_pm(hdr->frame_control)) { | |
291 | if (qc[1] & (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8)) | |
292 | pm = NL80211_MESH_POWER_DEEP_SLEEP; | |
293 | else | |
294 | pm = NL80211_MESH_POWER_LIGHT_SLEEP; | |
295 | } else { | |
296 | pm = NL80211_MESH_POWER_ACTIVE; | |
297 | } | |
298 | ||
433f5bc1 | 299 | if (sta->mesh->peer_pm == pm) |
3f52b7e3 MP |
300 | return; |
301 | ||
302 | mps_dbg(sta->sdata, "STA %pM enters mode %d\n", | |
303 | sta->sta.addr, pm); | |
304 | ||
433f5bc1 | 305 | sta->mesh->peer_pm = pm; |
3f52b7e3 MP |
306 | |
307 | ieee80211_mps_sta_status_update(sta); | |
308 | } | |
309 | ||
310 | static void mps_set_sta_nonpeer_pm(struct sta_info *sta, | |
311 | struct ieee80211_hdr *hdr) | |
312 | { | |
313 | enum nl80211_mesh_power_mode pm; | |
314 | ||
315 | if (ieee80211_has_pm(hdr->frame_control)) | |
316 | pm = NL80211_MESH_POWER_DEEP_SLEEP; | |
317 | else | |
318 | pm = NL80211_MESH_POWER_ACTIVE; | |
319 | ||
433f5bc1 | 320 | if (sta->mesh->nonpeer_pm == pm) |
3f52b7e3 MP |
321 | return; |
322 | ||
323 | mps_dbg(sta->sdata, "STA %pM sets non-peer mode to %d\n", | |
324 | sta->sta.addr, pm); | |
325 | ||
433f5bc1 | 326 | sta->mesh->nonpeer_pm = pm; |
3f52b7e3 MP |
327 | |
328 | ieee80211_mps_sta_status_update(sta); | |
329 | } | |
330 | ||
331 | /** | |
332 | * ieee80211_mps_rx_h_sta_process - frame receive handler for mesh powersave | |
333 | * | |
334 | * @sta: STA info that transmitted the frame | |
335 | * @hdr: IEEE 802.11 (QoS) Header | |
336 | */ | |
337 | void ieee80211_mps_rx_h_sta_process(struct sta_info *sta, | |
338 | struct ieee80211_hdr *hdr) | |
339 | { | |
340 | if (is_unicast_ether_addr(hdr->addr1) && | |
341 | ieee80211_is_data_qos(hdr->frame_control)) { | |
342 | /* | |
343 | * individually addressed QoS Data/Null frames contain | |
344 | * peer link-specific PS mode towards the local STA | |
345 | */ | |
346 | mps_set_sta_peer_pm(sta, hdr); | |
347 | ||
348 | /* check for mesh Peer Service Period trigger frames */ | |
349 | ieee80211_mpsp_trigger_process(ieee80211_get_qos_ctl(hdr), | |
350 | sta, false, false); | |
351 | } else { | |
352 | /* | |
353 | * can only determine non-peer PS mode | |
354 | * (see IEEE802.11-2012 8.2.4.1.7) | |
355 | */ | |
356 | mps_set_sta_nonpeer_pm(sta, hdr); | |
357 | } | |
358 | } | |
359 | ||
360 | ||
361 | /* mesh PS frame release */ | |
362 | ||
363 | static void mpsp_trigger_send(struct sta_info *sta, bool rspi, bool eosp) | |
364 | { | |
365 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
366 | struct sk_buff *skb; | |
367 | struct ieee80211_hdr *nullfunc; | |
368 | struct ieee80211_tx_info *info; | |
369 | u8 *qc; | |
370 | ||
371 | skb = mps_qos_null_get(sta); | |
372 | if (!skb) | |
373 | return; | |
374 | ||
375 | nullfunc = (struct ieee80211_hdr *) skb->data; | |
376 | if (!eosp) | |
377 | nullfunc->frame_control |= | |
378 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
379 | /* | |
380 | * | RSPI | EOSP | MPSP triggering | | |
381 | * +------+------+--------------------+ | |
382 | * | 0 | 0 | local STA is owner | | |
383 | * | 0 | 1 | no MPSP (MPSP end) | | |
384 | * | 1 | 0 | both STA are owner | | |
385 | * | 1 | 1 | peer STA is owner | see IEEE802.11-2012 13.14.9.2 | |
386 | */ | |
387 | qc = ieee80211_get_qos_ctl(nullfunc); | |
388 | if (rspi) | |
389 | qc[1] |= (IEEE80211_QOS_CTL_RSPI >> 8); | |
390 | if (eosp) | |
391 | qc[0] |= IEEE80211_QOS_CTL_EOSP; | |
392 | ||
393 | info = IEEE80211_SKB_CB(skb); | |
394 | ||
395 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | | |
396 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
397 | ||
398 | mps_dbg(sdata, "sending MPSP trigger%s%s to %pM\n", | |
399 | rspi ? " RSPI" : "", eosp ? " EOSP" : "", sta->sta.addr); | |
400 | ||
401 | ieee80211_tx_skb(sdata, skb); | |
402 | } | |
403 | ||
404 | /** | |
405 | * mpsp_qos_null_append - append QoS Null frame to MPSP skb queue if needed | |
406 | * | |
407 | * To properly end a mesh MPSP the last transmitted frame has to set the EOSP | |
408 | * flag in the QoS Control field. In case the current tailing frame is not a | |
409 | * QoS Data frame, append a QoS Null to carry the flag. | |
410 | */ | |
411 | static void mpsp_qos_null_append(struct sta_info *sta, | |
412 | struct sk_buff_head *frames) | |
413 | { | |
414 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
415 | struct sk_buff *new_skb, *skb = skb_peek_tail(frames); | |
416 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
417 | struct ieee80211_tx_info *info; | |
418 | ||
419 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
420 | return; | |
421 | ||
422 | new_skb = mps_qos_null_get(sta); | |
423 | if (!new_skb) | |
424 | return; | |
425 | ||
426 | mps_dbg(sdata, "appending QoS Null in MPSP towards %pM\n", | |
427 | sta->sta.addr); | |
428 | /* | |
429 | * This frame has to be transmitted last. Assign lowest priority to | |
430 | * make sure it cannot pass other frames when releasing multiple ACs. | |
431 | */ | |
432 | new_skb->priority = 1; | |
433 | skb_set_queue_mapping(new_skb, IEEE80211_AC_BK); | |
434 | ieee80211_set_qos_hdr(sdata, new_skb); | |
435 | ||
436 | info = IEEE80211_SKB_CB(new_skb); | |
437 | info->control.vif = &sdata->vif; | |
438 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
439 | ||
440 | __skb_queue_tail(frames, new_skb); | |
441 | } | |
442 | ||
443 | /** | |
444 | * mps_frame_deliver - transmit frames during mesh powersave | |
445 | * | |
446 | * @sta: STA info to transmit to | |
447 | * @n_frames: number of frames to transmit. -1 for all | |
448 | */ | |
449 | static void mps_frame_deliver(struct sta_info *sta, int n_frames) | |
450 | { | |
446075d7 | 451 | struct ieee80211_local *local = sta->sdata->local; |
3f52b7e3 MP |
452 | int ac; |
453 | struct sk_buff_head frames; | |
454 | struct sk_buff *skb; | |
455 | bool more_data = false; | |
456 | ||
457 | skb_queue_head_init(&frames); | |
458 | ||
459 | /* collect frame(s) from buffers */ | |
460 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
461 | while (n_frames != 0) { | |
462 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
463 | if (!skb) { | |
464 | skb = skb_dequeue( | |
465 | &sta->ps_tx_buf[ac]); | |
466 | if (skb) | |
467 | local->total_ps_buffered--; | |
468 | } | |
469 | if (!skb) | |
470 | break; | |
471 | n_frames--; | |
472 | __skb_queue_tail(&frames, skb); | |
473 | } | |
474 | ||
475 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
476 | !skb_queue_empty(&sta->ps_tx_buf[ac])) | |
477 | more_data = true; | |
478 | } | |
479 | ||
480 | /* nothing to send? -> EOSP */ | |
481 | if (skb_queue_empty(&frames)) { | |
482 | mpsp_trigger_send(sta, false, true); | |
483 | return; | |
484 | } | |
485 | ||
486 | /* in a MPSP make sure the last skb is a QoS Data frame */ | |
487 | if (test_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
488 | mpsp_qos_null_append(sta, &frames); | |
489 | ||
490 | mps_dbg(sta->sdata, "sending %d frames to PS STA %pM\n", | |
491 | skb_queue_len(&frames), sta->sta.addr); | |
492 | ||
493 | /* prepare collected frames for transmission */ | |
494 | skb_queue_walk(&frames, skb) { | |
495 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
496 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
497 | ||
498 | /* | |
499 | * Tell TX path to send this frame even though the | |
500 | * STA may still remain is PS mode after this frame | |
501 | * exchange. | |
502 | */ | |
503 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
504 | ||
505 | if (more_data || !skb_queue_is_last(&frames, skb)) | |
506 | hdr->frame_control |= | |
507 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
508 | else | |
509 | hdr->frame_control &= | |
510 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
511 | ||
512 | if (skb_queue_is_last(&frames, skb) && | |
513 | ieee80211_is_data_qos(hdr->frame_control)) { | |
514 | u8 *qoshdr = ieee80211_get_qos_ctl(hdr); | |
515 | ||
516 | /* MPSP trigger frame ends service period */ | |
517 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
518 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
519 | } | |
520 | } | |
521 | ||
522 | ieee80211_add_pending_skbs(local, &frames); | |
523 | sta_info_recalc_tim(sta); | |
524 | } | |
525 | ||
526 | /** | |
527 | * ieee80211_mpsp_trigger_process - track status of mesh Peer Service Periods | |
528 | * | |
529 | * @qc: QoS Control field | |
530 | * @sta: peer to start a MPSP with | |
531 | * @tx: frame was transmitted by the local STA | |
532 | * @acked: frame has been transmitted successfully | |
533 | * | |
534 | * NOTE: active mode STA may only serve as MPSP owner | |
535 | */ | |
536 | void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta, | |
537 | bool tx, bool acked) | |
538 | { | |
539 | u8 rspi = qc[1] & (IEEE80211_QOS_CTL_RSPI >> 8); | |
540 | u8 eosp = qc[0] & IEEE80211_QOS_CTL_EOSP; | |
541 | ||
542 | if (tx) { | |
543 | if (rspi && acked) | |
544 | set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
545 | ||
546 | if (eosp) | |
547 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); | |
548 | else if (acked && | |
549 | test_sta_flag(sta, WLAN_STA_PS_STA) && | |
550 | !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
551 | mps_frame_deliver(sta, -1); | |
552 | } else { | |
553 | if (eosp) | |
554 | clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
433f5bc1 | 555 | else if (sta->mesh->local_pm != NL80211_MESH_POWER_ACTIVE) |
3f52b7e3 MP |
556 | set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); |
557 | ||
558 | if (rspi && !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
559 | mps_frame_deliver(sta, -1); | |
560 | } | |
561 | } | |
562 | ||
563 | /** | |
446075d7 | 564 | * ieee80211_mps_frame_release - release frames buffered due to mesh power save |
3f52b7e3 MP |
565 | * |
566 | * @sta: mesh STA | |
446075d7 | 567 | * @elems: IEs of beacon or probe response |
3f52b7e3 MP |
568 | * |
569 | * For peers if we have individually-addressed frames buffered or the peer | |
570 | * indicates buffered frames, send a corresponding MPSP trigger frame. Since | |
571 | * we do not evaluate the awake window duration, QoS Nulls are used as MPSP | |
572 | * trigger frames. If the neighbour STA is not a peer, only send single frames. | |
573 | */ | |
574 | void ieee80211_mps_frame_release(struct sta_info *sta, | |
575 | struct ieee802_11_elems *elems) | |
576 | { | |
577 | int ac, buffer_local = 0; | |
578 | bool has_buffered = false; | |
579 | ||
433f5bc1 | 580 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 | 581 | has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len, |
a69bd8e6 | 582 | sta->mesh->aid); |
3f52b7e3 MP |
583 | |
584 | if (has_buffered) | |
585 | mps_dbg(sta->sdata, "%pM indicates buffered frames\n", | |
586 | sta->sta.addr); | |
587 | ||
588 | /* only transmit to PS STA with announced, non-zero awake window */ | |
589 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && | |
590 | (!elems->awake_window || !le16_to_cpu(*elems->awake_window))) | |
591 | return; | |
592 | ||
446075d7 MP |
593 | if (!test_sta_flag(sta, WLAN_STA_MPSP_OWNER)) |
594 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
595 | buffer_local += skb_queue_len(&sta->ps_tx_buf[ac]) + | |
596 | skb_queue_len(&sta->tx_filtered[ac]); | |
3f52b7e3 MP |
597 | |
598 | if (!has_buffered && !buffer_local) | |
599 | return; | |
600 | ||
433f5bc1 | 601 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 MP |
602 | mpsp_trigger_send(sta, has_buffered, !buffer_local); |
603 | else | |
604 | mps_frame_deliver(sta, 1); | |
605 | } |