Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
3f52b7e3 MP |
2 | /* |
3 | * Copyright 2012-2013, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de> | |
4 | * Copyright 2012-2013, cozybit Inc. | |
b9731062 | 5 | * Copyright (C) 2021 Intel Corporation |
15ddba5f | 6 | * Copyright (C) 2023 Intel Corporation |
3f52b7e3 MP |
7 | */ |
8 | ||
9 | #include "mesh.h" | |
10 | #include "wme.h" | |
11 | ||
12 | ||
13 | /* mesh PS management */ | |
14 | ||
15 | /** | |
16 | * mps_qos_null_get - create pre-addressed QoS Null frame for mesh powersave | |
21439b65 | 17 | * @sta: the station to get the frame for |
c00de1c4 BB |
18 | * |
19 | * Returns: A newly allocated SKB | |
3f52b7e3 MP |
20 | */ |
21 | static struct sk_buff *mps_qos_null_get(struct sta_info *sta) | |
22 | { | |
23 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
24 | struct ieee80211_local *local = sdata->local; | |
25 | struct ieee80211_hdr *nullfunc; /* use 4addr header */ | |
26 | struct sk_buff *skb; | |
27 | int size = sizeof(*nullfunc); | |
28 | __le16 fc; | |
29 | ||
30 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + size + 2); | |
31 | if (!skb) | |
32 | return NULL; | |
33 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
34 | ||
4df864c1 | 35 | nullfunc = skb_put(skb, size); |
3f52b7e3 MP |
36 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC); |
37 | ieee80211_fill_mesh_addresses(nullfunc, &fc, sta->sta.addr, | |
38 | sdata->vif.addr); | |
39 | nullfunc->frame_control = fc; | |
40 | nullfunc->duration_id = 0; | |
864a6040 | 41 | nullfunc->seq_ctrl = 0; |
3f52b7e3 MP |
42 | /* no address resolution for this frame -> set addr 1 immediately */ |
43 | memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN); | |
b080db58 | 44 | skb_put_zero(skb, 2); /* append QoS control field */ |
3f52b7e3 MP |
45 | ieee80211_mps_set_frame_flags(sdata, sta, nullfunc); |
46 | ||
47 | return skb; | |
48 | } | |
49 | ||
50 | /** | |
51 | * mps_qos_null_tx - send a QoS Null to indicate link-specific power mode | |
21439b65 | 52 | * @sta: the station to send to |
3f52b7e3 MP |
53 | */ |
54 | static void mps_qos_null_tx(struct sta_info *sta) | |
55 | { | |
56 | struct sk_buff *skb; | |
57 | ||
58 | skb = mps_qos_null_get(sta); | |
59 | if (!skb) | |
60 | return; | |
61 | ||
62 | mps_dbg(sta->sdata, "announcing peer-specific power mode to %pM\n", | |
63 | sta->sta.addr); | |
64 | ||
65 | /* don't unintentionally start a MPSP */ | |
66 | if (!test_sta_flag(sta, WLAN_STA_PS_STA)) { | |
67 | u8 *qc = ieee80211_get_qos_ctl((void *) skb->data); | |
68 | ||
69 | qc[0] |= IEEE80211_QOS_CTL_EOSP; | |
70 | } | |
71 | ||
72 | ieee80211_tx_skb(sta->sdata, skb); | |
73 | } | |
74 | ||
75 | /** | |
76 | * ieee80211_mps_local_status_update - track status of local link-specific PMs | |
77 | * | |
78 | * @sdata: local mesh subif | |
79 | * | |
80 | * sets the non-peer power mode and triggers the driver PS (re-)configuration | |
39886b61 | 81 | * Return BSS_CHANGED_BEACON if a beacon update is necessary. |
c00de1c4 BB |
82 | * |
83 | * Returns: BSS_CHANGED_BEACON if a beacon update is in order. | |
3f52b7e3 | 84 | */ |
15ddba5f | 85 | u64 ieee80211_mps_local_status_update(struct ieee80211_sub_if_data *sdata) |
3f52b7e3 MP |
86 | { |
87 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
88 | struct sta_info *sta; | |
89 | bool peering = false; | |
90 | int light_sleep_cnt = 0; | |
91 | int deep_sleep_cnt = 0; | |
15ddba5f | 92 | u64 changed = 0; |
39886b61 | 93 | enum nl80211_mesh_power_mode nonpeer_pm; |
3f52b7e3 MP |
94 | |
95 | rcu_read_lock(); | |
96 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
97 | if (sdata != sta->sdata) | |
98 | continue; | |
99 | ||
433f5bc1 | 100 | switch (sta->mesh->plink_state) { |
3f52b7e3 MP |
101 | case NL80211_PLINK_OPN_SNT: |
102 | case NL80211_PLINK_OPN_RCVD: | |
103 | case NL80211_PLINK_CNF_RCVD: | |
104 | peering = true; | |
105 | break; | |
106 | case NL80211_PLINK_ESTAB: | |
433f5bc1 | 107 | if (sta->mesh->local_pm == NL80211_MESH_POWER_LIGHT_SLEEP) |
3f52b7e3 | 108 | light_sleep_cnt++; |
433f5bc1 | 109 | else if (sta->mesh->local_pm == NL80211_MESH_POWER_DEEP_SLEEP) |
3f52b7e3 MP |
110 | deep_sleep_cnt++; |
111 | break; | |
112 | default: | |
113 | break; | |
114 | } | |
115 | } | |
116 | rcu_read_unlock(); | |
117 | ||
118 | /* | |
119 | * Set non-peer mode to active during peering/scanning/authentication | |
120 | * (see IEEE802.11-2012 13.14.8.3). The non-peer mesh power mode is | |
121 | * deep sleep if the local STA is in light or deep sleep towards at | |
122 | * least one mesh peer (see 13.14.3.1). Otherwise, set it to the | |
123 | * user-configured default value. | |
124 | */ | |
125 | if (peering) { | |
126 | mps_dbg(sdata, "setting non-peer PM to active for peering\n"); | |
39886b61 | 127 | nonpeer_pm = NL80211_MESH_POWER_ACTIVE; |
3f52b7e3 MP |
128 | } else if (light_sleep_cnt || deep_sleep_cnt) { |
129 | mps_dbg(sdata, "setting non-peer PM to deep sleep\n"); | |
39886b61 | 130 | nonpeer_pm = NL80211_MESH_POWER_DEEP_SLEEP; |
3f52b7e3 MP |
131 | } else { |
132 | mps_dbg(sdata, "setting non-peer PM to user value\n"); | |
39886b61 | 133 | nonpeer_pm = ifmsh->mshcfg.power_mode; |
3f52b7e3 MP |
134 | } |
135 | ||
39886b61 TP |
136 | /* need update if sleep counts move between 0 and non-zero */ |
137 | if (ifmsh->nonpeer_pm != nonpeer_pm || | |
138 | !ifmsh->ps_peers_light_sleep != !light_sleep_cnt || | |
139 | !ifmsh->ps_peers_deep_sleep != !deep_sleep_cnt) | |
140 | changed = BSS_CHANGED_BEACON; | |
141 | ||
142 | ifmsh->nonpeer_pm = nonpeer_pm; | |
3f52b7e3 MP |
143 | ifmsh->ps_peers_light_sleep = light_sleep_cnt; |
144 | ifmsh->ps_peers_deep_sleep = deep_sleep_cnt; | |
39886b61 TP |
145 | |
146 | return changed; | |
3f52b7e3 MP |
147 | } |
148 | ||
149 | /** | |
150 | * ieee80211_mps_set_sta_local_pm - set local PM towards a mesh STA | |
151 | * | |
152 | * @sta: mesh STA | |
153 | * @pm: the power mode to set | |
c00de1c4 | 154 | * Returns: BSS_CHANGED_BEACON if a beacon update is in order. |
3f52b7e3 | 155 | */ |
15ddba5f | 156 | u64 ieee80211_mps_set_sta_local_pm(struct sta_info *sta, |
39886b61 | 157 | enum nl80211_mesh_power_mode pm) |
3f52b7e3 MP |
158 | { |
159 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
160 | ||
433f5bc1 | 161 | if (sta->mesh->local_pm == pm) |
446075d7 MP |
162 | return 0; |
163 | ||
3f52b7e3 MP |
164 | mps_dbg(sdata, "local STA operates in mode %d with %pM\n", |
165 | pm, sta->sta.addr); | |
166 | ||
433f5bc1 | 167 | sta->mesh->local_pm = pm; |
3f52b7e3 MP |
168 | |
169 | /* | |
170 | * announce peer-specific power mode transition | |
171 | * (see IEEE802.11-2012 13.14.3.2 and 13.14.3.3) | |
172 | */ | |
433f5bc1 | 173 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 MP |
174 | mps_qos_null_tx(sta); |
175 | ||
39886b61 | 176 | return ieee80211_mps_local_status_update(sdata); |
3f52b7e3 MP |
177 | } |
178 | ||
179 | /** | |
180 | * ieee80211_mps_set_frame_flags - set mesh PS flags in FC (and QoS Control) | |
181 | * | |
182 | * @sdata: local mesh subif | |
183 | * @sta: mesh STA | |
184 | * @hdr: 802.11 frame header | |
185 | * | |
186 | * see IEEE802.11-2012 8.2.4.1.7 and 8.2.4.5.11 | |
187 | * | |
188 | * NOTE: sta must be given when an individually-addressed QoS frame header | |
189 | * is handled, for group-addressed and management frames it is not used | |
190 | */ | |
191 | void ieee80211_mps_set_frame_flags(struct ieee80211_sub_if_data *sdata, | |
192 | struct sta_info *sta, | |
193 | struct ieee80211_hdr *hdr) | |
194 | { | |
195 | enum nl80211_mesh_power_mode pm; | |
196 | u8 *qc; | |
197 | ||
198 | if (WARN_ON(is_unicast_ether_addr(hdr->addr1) && | |
199 | ieee80211_is_data_qos(hdr->frame_control) && | |
200 | !sta)) | |
201 | return; | |
202 | ||
203 | if (is_unicast_ether_addr(hdr->addr1) && | |
204 | ieee80211_is_data_qos(hdr->frame_control) && | |
433f5bc1 JB |
205 | sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
206 | pm = sta->mesh->local_pm; | |
3f52b7e3 MP |
207 | else |
208 | pm = sdata->u.mesh.nonpeer_pm; | |
209 | ||
210 | if (pm == NL80211_MESH_POWER_ACTIVE) | |
211 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_PM); | |
212 | else | |
213 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); | |
214 | ||
215 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
216 | return; | |
217 | ||
218 | qc = ieee80211_get_qos_ctl(hdr); | |
219 | ||
220 | if ((is_unicast_ether_addr(hdr->addr1) && | |
221 | pm == NL80211_MESH_POWER_DEEP_SLEEP) || | |
222 | (is_multicast_ether_addr(hdr->addr1) && | |
223 | sdata->u.mesh.ps_peers_deep_sleep > 0)) | |
224 | qc[1] |= (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8); | |
225 | else | |
226 | qc[1] &= ~(IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8); | |
227 | } | |
228 | ||
229 | /** | |
230 | * ieee80211_mps_sta_status_update - update buffering status of neighbor STA | |
231 | * | |
232 | * @sta: mesh STA | |
233 | * | |
234 | * called after change of peering status or non-peer/peer-specific power mode | |
235 | */ | |
236 | void ieee80211_mps_sta_status_update(struct sta_info *sta) | |
237 | { | |
238 | enum nl80211_mesh_power_mode pm; | |
239 | bool do_buffer; | |
240 | ||
40d18ff9 CYY |
241 | /* For non-assoc STA, prevent buffering or frame transmission */ |
242 | if (sta->sta_state < IEEE80211_STA_ASSOC) | |
243 | return; | |
244 | ||
3f52b7e3 MP |
245 | /* |
246 | * use peer-specific power mode if peering is established and the | |
247 | * peer's power mode is known | |
248 | */ | |
433f5bc1 JB |
249 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB && |
250 | sta->mesh->peer_pm != NL80211_MESH_POWER_UNKNOWN) | |
251 | pm = sta->mesh->peer_pm; | |
3f52b7e3 | 252 | else |
433f5bc1 | 253 | pm = sta->mesh->nonpeer_pm; |
3f52b7e3 MP |
254 | |
255 | do_buffer = (pm != NL80211_MESH_POWER_ACTIVE); | |
256 | ||
446075d7 | 257 | /* clear the MPSP flags for non-peers or active STA */ |
433f5bc1 | 258 | if (sta->mesh->plink_state != NL80211_PLINK_ESTAB) { |
446075d7 MP |
259 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); |
260 | clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
261 | } else if (!do_buffer) { | |
262 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); | |
263 | } | |
264 | ||
3f52b7e3 MP |
265 | /* Don't let the same PS state be set twice */ |
266 | if (test_sta_flag(sta, WLAN_STA_PS_STA) == do_buffer) | |
267 | return; | |
268 | ||
269 | if (do_buffer) { | |
270 | set_sta_flag(sta, WLAN_STA_PS_STA); | |
271 | atomic_inc(&sta->sdata->u.mesh.ps.num_sta_ps); | |
272 | mps_dbg(sta->sdata, "start PS buffering frames towards %pM\n", | |
273 | sta->sta.addr); | |
274 | } else { | |
275 | ieee80211_sta_ps_deliver_wakeup(sta); | |
276 | } | |
3f52b7e3 MP |
277 | } |
278 | ||
279 | static void mps_set_sta_peer_pm(struct sta_info *sta, | |
280 | struct ieee80211_hdr *hdr) | |
281 | { | |
282 | enum nl80211_mesh_power_mode pm; | |
283 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
284 | ||
285 | /* | |
286 | * Test Power Management field of frame control (PW) and | |
287 | * mesh power save level subfield of QoS control field (PSL) | |
288 | * | |
289 | * | PM | PSL| Mesh PM | | |
290 | * +----+----+---------+ | |
291 | * | 0 |Rsrv| Active | | |
292 | * | 1 | 0 | Light | | |
293 | * | 1 | 1 | Deep | | |
294 | */ | |
295 | if (ieee80211_has_pm(hdr->frame_control)) { | |
296 | if (qc[1] & (IEEE80211_QOS_CTL_MESH_PS_LEVEL >> 8)) | |
297 | pm = NL80211_MESH_POWER_DEEP_SLEEP; | |
298 | else | |
299 | pm = NL80211_MESH_POWER_LIGHT_SLEEP; | |
300 | } else { | |
301 | pm = NL80211_MESH_POWER_ACTIVE; | |
302 | } | |
303 | ||
433f5bc1 | 304 | if (sta->mesh->peer_pm == pm) |
3f52b7e3 MP |
305 | return; |
306 | ||
307 | mps_dbg(sta->sdata, "STA %pM enters mode %d\n", | |
308 | sta->sta.addr, pm); | |
309 | ||
433f5bc1 | 310 | sta->mesh->peer_pm = pm; |
3f52b7e3 MP |
311 | |
312 | ieee80211_mps_sta_status_update(sta); | |
313 | } | |
314 | ||
315 | static void mps_set_sta_nonpeer_pm(struct sta_info *sta, | |
316 | struct ieee80211_hdr *hdr) | |
317 | { | |
318 | enum nl80211_mesh_power_mode pm; | |
319 | ||
320 | if (ieee80211_has_pm(hdr->frame_control)) | |
321 | pm = NL80211_MESH_POWER_DEEP_SLEEP; | |
322 | else | |
323 | pm = NL80211_MESH_POWER_ACTIVE; | |
324 | ||
433f5bc1 | 325 | if (sta->mesh->nonpeer_pm == pm) |
3f52b7e3 MP |
326 | return; |
327 | ||
328 | mps_dbg(sta->sdata, "STA %pM sets non-peer mode to %d\n", | |
329 | sta->sta.addr, pm); | |
330 | ||
433f5bc1 | 331 | sta->mesh->nonpeer_pm = pm; |
3f52b7e3 MP |
332 | |
333 | ieee80211_mps_sta_status_update(sta); | |
334 | } | |
335 | ||
336 | /** | |
337 | * ieee80211_mps_rx_h_sta_process - frame receive handler for mesh powersave | |
338 | * | |
339 | * @sta: STA info that transmitted the frame | |
340 | * @hdr: IEEE 802.11 (QoS) Header | |
341 | */ | |
342 | void ieee80211_mps_rx_h_sta_process(struct sta_info *sta, | |
343 | struct ieee80211_hdr *hdr) | |
344 | { | |
345 | if (is_unicast_ether_addr(hdr->addr1) && | |
346 | ieee80211_is_data_qos(hdr->frame_control)) { | |
347 | /* | |
348 | * individually addressed QoS Data/Null frames contain | |
349 | * peer link-specific PS mode towards the local STA | |
350 | */ | |
351 | mps_set_sta_peer_pm(sta, hdr); | |
352 | ||
353 | /* check for mesh Peer Service Period trigger frames */ | |
354 | ieee80211_mpsp_trigger_process(ieee80211_get_qos_ctl(hdr), | |
355 | sta, false, false); | |
356 | } else { | |
357 | /* | |
358 | * can only determine non-peer PS mode | |
359 | * (see IEEE802.11-2012 8.2.4.1.7) | |
360 | */ | |
361 | mps_set_sta_nonpeer_pm(sta, hdr); | |
362 | } | |
363 | } | |
364 | ||
365 | ||
366 | /* mesh PS frame release */ | |
367 | ||
368 | static void mpsp_trigger_send(struct sta_info *sta, bool rspi, bool eosp) | |
369 | { | |
370 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
371 | struct sk_buff *skb; | |
372 | struct ieee80211_hdr *nullfunc; | |
373 | struct ieee80211_tx_info *info; | |
374 | u8 *qc; | |
375 | ||
376 | skb = mps_qos_null_get(sta); | |
377 | if (!skb) | |
378 | return; | |
379 | ||
380 | nullfunc = (struct ieee80211_hdr *) skb->data; | |
381 | if (!eosp) | |
382 | nullfunc->frame_control |= | |
383 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
384 | /* | |
385 | * | RSPI | EOSP | MPSP triggering | | |
386 | * +------+------+--------------------+ | |
387 | * | 0 | 0 | local STA is owner | | |
388 | * | 0 | 1 | no MPSP (MPSP end) | | |
389 | * | 1 | 0 | both STA are owner | | |
390 | * | 1 | 1 | peer STA is owner | see IEEE802.11-2012 13.14.9.2 | |
391 | */ | |
392 | qc = ieee80211_get_qos_ctl(nullfunc); | |
393 | if (rspi) | |
394 | qc[1] |= (IEEE80211_QOS_CTL_RSPI >> 8); | |
395 | if (eosp) | |
396 | qc[0] |= IEEE80211_QOS_CTL_EOSP; | |
397 | ||
398 | info = IEEE80211_SKB_CB(skb); | |
399 | ||
400 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER | | |
401 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
402 | ||
403 | mps_dbg(sdata, "sending MPSP trigger%s%s to %pM\n", | |
404 | rspi ? " RSPI" : "", eosp ? " EOSP" : "", sta->sta.addr); | |
405 | ||
406 | ieee80211_tx_skb(sdata, skb); | |
407 | } | |
408 | ||
409 | /** | |
410 | * mpsp_qos_null_append - append QoS Null frame to MPSP skb queue if needed | |
21439b65 JB |
411 | * @sta: the station to handle |
412 | * @frames: the frame list to append to | |
3f52b7e3 MP |
413 | * |
414 | * To properly end a mesh MPSP the last transmitted frame has to set the EOSP | |
415 | * flag in the QoS Control field. In case the current tailing frame is not a | |
416 | * QoS Data frame, append a QoS Null to carry the flag. | |
417 | */ | |
418 | static void mpsp_qos_null_append(struct sta_info *sta, | |
419 | struct sk_buff_head *frames) | |
420 | { | |
421 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
422 | struct sk_buff *new_skb, *skb = skb_peek_tail(frames); | |
423 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
424 | struct ieee80211_tx_info *info; | |
425 | ||
426 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
427 | return; | |
428 | ||
429 | new_skb = mps_qos_null_get(sta); | |
430 | if (!new_skb) | |
431 | return; | |
432 | ||
433 | mps_dbg(sdata, "appending QoS Null in MPSP towards %pM\n", | |
434 | sta->sta.addr); | |
435 | /* | |
436 | * This frame has to be transmitted last. Assign lowest priority to | |
437 | * make sure it cannot pass other frames when releasing multiple ACs. | |
438 | */ | |
439 | new_skb->priority = 1; | |
440 | skb_set_queue_mapping(new_skb, IEEE80211_AC_BK); | |
441 | ieee80211_set_qos_hdr(sdata, new_skb); | |
442 | ||
443 | info = IEEE80211_SKB_CB(new_skb); | |
444 | info->control.vif = &sdata->vif; | |
cc20ff2c | 445 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
3f52b7e3 MP |
446 | |
447 | __skb_queue_tail(frames, new_skb); | |
448 | } | |
449 | ||
450 | /** | |
451 | * mps_frame_deliver - transmit frames during mesh powersave | |
452 | * | |
453 | * @sta: STA info to transmit to | |
454 | * @n_frames: number of frames to transmit. -1 for all | |
455 | */ | |
456 | static void mps_frame_deliver(struct sta_info *sta, int n_frames) | |
457 | { | |
446075d7 | 458 | struct ieee80211_local *local = sta->sdata->local; |
3f52b7e3 MP |
459 | int ac; |
460 | struct sk_buff_head frames; | |
461 | struct sk_buff *skb; | |
462 | bool more_data = false; | |
463 | ||
464 | skb_queue_head_init(&frames); | |
465 | ||
466 | /* collect frame(s) from buffers */ | |
467 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
468 | while (n_frames != 0) { | |
469 | skb = skb_dequeue(&sta->tx_filtered[ac]); | |
470 | if (!skb) { | |
471 | skb = skb_dequeue( | |
472 | &sta->ps_tx_buf[ac]); | |
473 | if (skb) | |
474 | local->total_ps_buffered--; | |
475 | } | |
476 | if (!skb) | |
477 | break; | |
478 | n_frames--; | |
479 | __skb_queue_tail(&frames, skb); | |
480 | } | |
481 | ||
482 | if (!skb_queue_empty(&sta->tx_filtered[ac]) || | |
483 | !skb_queue_empty(&sta->ps_tx_buf[ac])) | |
484 | more_data = true; | |
485 | } | |
486 | ||
487 | /* nothing to send? -> EOSP */ | |
488 | if (skb_queue_empty(&frames)) { | |
489 | mpsp_trigger_send(sta, false, true); | |
490 | return; | |
491 | } | |
492 | ||
493 | /* in a MPSP make sure the last skb is a QoS Data frame */ | |
494 | if (test_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
495 | mpsp_qos_null_append(sta, &frames); | |
496 | ||
497 | mps_dbg(sta->sdata, "sending %d frames to PS STA %pM\n", | |
498 | skb_queue_len(&frames), sta->sta.addr); | |
499 | ||
500 | /* prepare collected frames for transmission */ | |
501 | skb_queue_walk(&frames, skb) { | |
502 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
503 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
504 | ||
505 | /* | |
506 | * Tell TX path to send this frame even though the | |
507 | * STA may still remain is PS mode after this frame | |
508 | * exchange. | |
509 | */ | |
510 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
511 | ||
512 | if (more_data || !skb_queue_is_last(&frames, skb)) | |
513 | hdr->frame_control |= | |
514 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
515 | else | |
516 | hdr->frame_control &= | |
517 | cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
518 | ||
519 | if (skb_queue_is_last(&frames, skb) && | |
520 | ieee80211_is_data_qos(hdr->frame_control)) { | |
521 | u8 *qoshdr = ieee80211_get_qos_ctl(hdr); | |
522 | ||
523 | /* MPSP trigger frame ends service period */ | |
524 | *qoshdr |= IEEE80211_QOS_CTL_EOSP; | |
525 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
526 | } | |
527 | } | |
528 | ||
529 | ieee80211_add_pending_skbs(local, &frames); | |
530 | sta_info_recalc_tim(sta); | |
531 | } | |
532 | ||
533 | /** | |
534 | * ieee80211_mpsp_trigger_process - track status of mesh Peer Service Periods | |
535 | * | |
536 | * @qc: QoS Control field | |
537 | * @sta: peer to start a MPSP with | |
538 | * @tx: frame was transmitted by the local STA | |
539 | * @acked: frame has been transmitted successfully | |
540 | * | |
541 | * NOTE: active mode STA may only serve as MPSP owner | |
542 | */ | |
543 | void ieee80211_mpsp_trigger_process(u8 *qc, struct sta_info *sta, | |
544 | bool tx, bool acked) | |
545 | { | |
546 | u8 rspi = qc[1] & (IEEE80211_QOS_CTL_RSPI >> 8); | |
547 | u8 eosp = qc[0] & IEEE80211_QOS_CTL_EOSP; | |
548 | ||
549 | if (tx) { | |
550 | if (rspi && acked) | |
551 | set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
552 | ||
553 | if (eosp) | |
554 | clear_sta_flag(sta, WLAN_STA_MPSP_OWNER); | |
555 | else if (acked && | |
556 | test_sta_flag(sta, WLAN_STA_PS_STA) && | |
557 | !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
558 | mps_frame_deliver(sta, -1); | |
559 | } else { | |
560 | if (eosp) | |
561 | clear_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); | |
433f5bc1 | 562 | else if (sta->mesh->local_pm != NL80211_MESH_POWER_ACTIVE) |
3f52b7e3 MP |
563 | set_sta_flag(sta, WLAN_STA_MPSP_RECIPIENT); |
564 | ||
565 | if (rspi && !test_and_set_sta_flag(sta, WLAN_STA_MPSP_OWNER)) | |
566 | mps_frame_deliver(sta, -1); | |
567 | } | |
568 | } | |
569 | ||
570 | /** | |
446075d7 | 571 | * ieee80211_mps_frame_release - release frames buffered due to mesh power save |
3f52b7e3 MP |
572 | * |
573 | * @sta: mesh STA | |
446075d7 | 574 | * @elems: IEs of beacon or probe response |
3f52b7e3 MP |
575 | * |
576 | * For peers if we have individually-addressed frames buffered or the peer | |
577 | * indicates buffered frames, send a corresponding MPSP trigger frame. Since | |
578 | * we do not evaluate the awake window duration, QoS Nulls are used as MPSP | |
579 | * trigger frames. If the neighbour STA is not a peer, only send single frames. | |
580 | */ | |
581 | void ieee80211_mps_frame_release(struct sta_info *sta, | |
582 | struct ieee802_11_elems *elems) | |
583 | { | |
584 | int ac, buffer_local = 0; | |
585 | bool has_buffered = false; | |
586 | ||
433f5bc1 | 587 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 | 588 | has_buffered = ieee80211_check_tim(elems->tim, elems->tim_len, |
a69bd8e6 | 589 | sta->mesh->aid); |
3f52b7e3 MP |
590 | |
591 | if (has_buffered) | |
592 | mps_dbg(sta->sdata, "%pM indicates buffered frames\n", | |
593 | sta->sta.addr); | |
594 | ||
595 | /* only transmit to PS STA with announced, non-zero awake window */ | |
596 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && | |
b9731062 | 597 | (!elems->awake_window || !get_unaligned_le16(elems->awake_window))) |
3f52b7e3 MP |
598 | return; |
599 | ||
446075d7 MP |
600 | if (!test_sta_flag(sta, WLAN_STA_MPSP_OWNER)) |
601 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) | |
602 | buffer_local += skb_queue_len(&sta->ps_tx_buf[ac]) + | |
603 | skb_queue_len(&sta->tx_filtered[ac]); | |
3f52b7e3 MP |
604 | |
605 | if (!has_buffered && !buffer_local) | |
606 | return; | |
607 | ||
433f5bc1 | 608 | if (sta->mesh->plink_state == NL80211_PLINK_ESTAB) |
3f52b7e3 MP |
609 | mpsp_trigger_send(sta, has_buffered, !buffer_local); |
610 | else | |
611 | mps_frame_deliver(sta, 1); | |
612 | } |