]>
Commit | Line | Data |
---|---|---|
b8695a8f JB |
1 | /* |
2 | * HT handling | |
3 | * | |
4 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
5 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
6 | * Copyright 2005-2006, Devicescape Software, Inc. | |
7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
a93e3644 | 9 | * Copyright 2007-2010, Intel Corporation |
50ea05ef | 10 | * Copyright(c) 2015 Intel Deutschland GmbH |
b8695a8f JB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
73a72a81 JB |
17 | /** |
18 | * DOC: RX A-MPDU aggregation | |
19 | * | |
20 | * Aggregation on the RX side requires only implementing the | |
21 | * @ampdu_action callback that is invoked to start/stop any | |
22 | * block-ack sessions for RX aggregation. | |
23 | * | |
24 | * When RX aggregation is started by the peer, the driver is | |
25 | * notified via @ampdu_action function, with the | |
26 | * %IEEE80211_AMPDU_RX_START action, and may reject the request | |
27 | * in which case a negative response is sent to the peer, if it | |
28 | * accepts it a positive response is sent. | |
29 | * | |
30 | * While the session is active, the device/driver are required | |
31 | * to de-aggregate frames and pass them up one by one to mac80211, | |
32 | * which will handle the reorder buffer. | |
33 | * | |
34 | * When the aggregation session is stopped again by the peer or | |
35 | * ourselves, the driver's @ampdu_action function will be called | |
36 | * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the | |
37 | * call must not fail. | |
38 | */ | |
39 | ||
b8695a8f | 40 | #include <linux/ieee80211.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
bc3b2d7f | 42 | #include <linux/export.h> |
b8695a8f JB |
43 | #include <net/mac80211.h> |
44 | #include "ieee80211_i.h" | |
24487981 | 45 | #include "driver-ops.h" |
b8695a8f | 46 | |
a87f736d JB |
47 | static void ieee80211_free_tid_rx(struct rcu_head *h) |
48 | { | |
49 | struct tid_ampdu_rx *tid_rx = | |
50 | container_of(h, struct tid_ampdu_rx, rcu_head); | |
51 | int i; | |
52 | ||
53 | for (i = 0; i < tid_rx->buf_size; i++) | |
83eb935e | 54 | __skb_queue_purge(&tid_rx->reorder_buf[i]); |
a87f736d JB |
55 | kfree(tid_rx->reorder_buf); |
56 | kfree(tid_rx->reorder_time); | |
57 | kfree(tid_rx); | |
58 | } | |
59 | ||
7c3b1dd8 | 60 | void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
53f73c09 | 61 | u16 initiator, u16 reason, bool tx) |
b8695a8f | 62 | { |
d75636ef | 63 | struct ieee80211_local *local = sta->local; |
098a6070 | 64 | struct tid_ampdu_rx *tid_rx; |
50ea05ef SS |
65 | struct ieee80211_ampdu_params params = { |
66 | .sta = &sta->sta, | |
67 | .action = IEEE80211_AMPDU_RX_STOP, | |
68 | .tid = tid, | |
69 | .amsdu = false, | |
70 | .timeout = 0, | |
71 | .ssn = 0, | |
72 | }; | |
b8695a8f | 73 | |
a93e3644 | 74 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
098a6070 | 75 | |
40b275b6 JB |
76 | tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid], |
77 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
a87f736d | 78 | |
7c3b1dd8 | 79 | if (!tid_rx) |
b8695a8f | 80 | return; |
d75636ef | 81 | |
a9b3cd7f | 82 | RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL); |
b8695a8f | 83 | |
bdcbd8e0 JB |
84 | ht_dbg(sta->sdata, |
85 | "Rx BA session stop requested for %pM tid %u %s reason: %d\n", | |
86 | sta->sta.addr, tid, | |
87 | initiator == WLAN_BACK_RECIPIENT ? "recipient" : "inititator", | |
88 | (int)reason); | |
b8695a8f | 89 | |
50ea05ef | 90 | if (drv_ampdu_action(local, sta->sdata, ¶ms)) |
bdcbd8e0 | 91 | sdata_info(sta->sdata, |
0a214d3f JB |
92 | "HW problem - can not stop rx aggregation for %pM tid %d\n", |
93 | sta->sta.addr, tid); | |
b8695a8f | 94 | |
b8695a8f | 95 | /* check if this is a self generated aggregation halt */ |
53f73c09 | 96 | if (initiator == WLAN_BACK_RECIPIENT && tx) |
d75636ef | 97 | ieee80211_send_delba(sta->sdata, sta->sta.addr, |
a7f39f60 | 98 | tid, WLAN_BACK_RECIPIENT, reason); |
b8695a8f | 99 | |
7c3b1dd8 | 100 | del_timer_sync(&tid_rx->session_timer); |
a87f736d | 101 | |
788211d8 JB |
102 | /* make sure ieee80211_sta_reorder_release() doesn't re-arm the timer */ |
103 | spin_lock_bh(&tid_rx->reorder_lock); | |
104 | tid_rx->removed = true; | |
105 | spin_unlock_bh(&tid_rx->reorder_lock); | |
106 | del_timer_sync(&tid_rx->reorder_timer); | |
107 | ||
a87f736d | 108 | call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx); |
b8695a8f JB |
109 | } |
110 | ||
2aab4c27 | 111 | void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
53f73c09 | 112 | u16 initiator, u16 reason, bool tx) |
2aab4c27 | 113 | { |
a93e3644 | 114 | mutex_lock(&sta->ampdu_mlme.mtx); |
53f73c09 | 115 | ___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx); |
a93e3644 | 116 | mutex_unlock(&sta->ampdu_mlme.mtx); |
2aab4c27 JB |
117 | } |
118 | ||
f41ccd71 SL |
119 | void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, |
120 | const u8 *addr) | |
121 | { | |
122 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
0a557ed3 | 123 | struct sta_info *sta; |
f41ccd71 SL |
124 | int i; |
125 | ||
0a557ed3 | 126 | rcu_read_lock(); |
bc192f89 | 127 | sta = sta_info_get_bss(sdata, addr); |
0a557ed3 EP |
128 | if (!sta) { |
129 | rcu_read_unlock(); | |
130 | return; | |
131 | } | |
132 | ||
5a306f58 | 133 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
f41ccd71 SL |
134 | if (ba_rx_bitmap & BIT(i)) |
135 | set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested); | |
136 | ||
137 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); | |
0a557ed3 | 138 | rcu_read_unlock(); |
f41ccd71 SL |
139 | } |
140 | EXPORT_SYMBOL(ieee80211_stop_rx_ba_session); | |
141 | ||
b8695a8f JB |
142 | /* |
143 | * After accepting the AddBA Request we activated a timer, | |
144 | * resetting it after each frame that arrives from the originator. | |
b8695a8f JB |
145 | */ |
146 | static void sta_rx_agg_session_timer_expired(unsigned long data) | |
147 | { | |
148 | /* not an elegant detour, but there is no choice as the timer passes | |
149 | * only one argument, and various sta_info are needed here, so init | |
150 | * flow in sta_info_create gives the TID as data, while the timer_to_id | |
151 | * array gives the sta through container_of */ | |
152 | u8 *ptid = (u8 *)data; | |
153 | u8 *timer_to_id = ptid - *ptid; | |
154 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
155 | timer_to_tid[0]); | |
12d3952f FF |
156 | struct tid_ampdu_rx *tid_rx; |
157 | unsigned long timeout; | |
158 | ||
d8c7aae6 | 159 | rcu_read_lock(); |
12d3952f | 160 | tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[*ptid]); |
d8c7aae6 FF |
161 | if (!tid_rx) { |
162 | rcu_read_unlock(); | |
12d3952f | 163 | return; |
d8c7aae6 | 164 | } |
12d3952f FF |
165 | |
166 | timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout); | |
167 | if (time_is_after_jiffies(timeout)) { | |
168 | mod_timer(&tid_rx->session_timer, timeout); | |
d8c7aae6 | 169 | rcu_read_unlock(); |
12d3952f FF |
170 | return; |
171 | } | |
d8c7aae6 | 172 | rcu_read_unlock(); |
b8695a8f | 173 | |
0a214d3f JB |
174 | ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n", |
175 | sta->sta.addr, (u16)*ptid); | |
d63e9ae3 | 176 | |
7c3b1dd8 JB |
177 | set_bit(*ptid, sta->ampdu_mlme.tid_rx_timer_expired); |
178 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); | |
b8695a8f JB |
179 | } |
180 | ||
2bff8ebf CL |
181 | static void sta_rx_agg_reorder_timer_expired(unsigned long data) |
182 | { | |
183 | u8 *ptid = (u8 *)data; | |
184 | u8 *timer_to_id = ptid - *ptid; | |
185 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
186 | timer_to_tid[0]); | |
187 | ||
188 | rcu_read_lock(); | |
2bff8ebf | 189 | ieee80211_release_reorder_timeout(sta, *ptid); |
2bff8ebf CL |
190 | rcu_read_unlock(); |
191 | } | |
192 | ||
b8695a8f JB |
193 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
194 | u8 dialog_token, u16 status, u16 policy, | |
195 | u16 buf_size, u16 timeout) | |
196 | { | |
b8695a8f JB |
197 | struct ieee80211_local *local = sdata->local; |
198 | struct sk_buff *skb; | |
199 | struct ieee80211_mgmt *mgmt; | |
99e7ca44 | 200 | bool amsdu = ieee80211_hw_check(&local->hw, SUPPORTS_AMSDU_IN_AMPDU); |
b8695a8f JB |
201 | u16 capab; |
202 | ||
203 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 204 | if (!skb) |
b8695a8f | 205 | return; |
b8695a8f JB |
206 | |
207 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
208 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
209 | memset(mgmt, 0, 24); | |
210 | memcpy(mgmt->da, da, ETH_ALEN); | |
47846c9b | 211 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 212 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
213 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
214 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 215 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
216 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
217 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
218 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
219 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 220 | |
b8695a8f JB |
221 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
222 | IEEE80211_STYPE_ACTION); | |
223 | ||
224 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
225 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
226 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
227 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
228 | ||
99e7ca44 EG |
229 | capab = (u16)(amsdu << 0); /* bit 0 A-MSDU support */ |
230 | capab |= (u16)(policy << 1); /* bit 1 aggregation policy */ | |
b8695a8f JB |
231 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
232 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
233 | ||
234 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
235 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
236 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
237 | ||
62ae67be | 238 | ieee80211_tx_skb(sdata, skb); |
b8695a8f JB |
239 | } |
240 | ||
08cf42e8 MK |
241 | void __ieee80211_start_rx_ba_session(struct sta_info *sta, |
242 | u8 dialog_token, u16 timeout, | |
243 | u16 start_seq_num, u16 ba_policy, u16 tid, | |
4549cf2b | 244 | u16 buf_size, bool tx, bool auto_seq) |
b8695a8f | 245 | { |
08cf42e8 | 246 | struct ieee80211_local *local = sta->sdata->local; |
b8695a8f | 247 | struct tid_ampdu_rx *tid_agg_rx; |
50ea05ef SS |
248 | struct ieee80211_ampdu_params params = { |
249 | .sta = &sta->sta, | |
250 | .action = IEEE80211_AMPDU_RX_START, | |
251 | .tid = tid, | |
252 | .amsdu = false, | |
253 | .timeout = timeout, | |
254 | .ssn = start_seq_num, | |
255 | }; | |
256 | ||
83eb935e | 257 | int i, ret = -EOPNOTSUPP; |
08cf42e8 | 258 | u16 status = WLAN_STATUS_REQUEST_DECLINED; |
b8695a8f | 259 | |
8f9c77fc JB |
260 | if (!sta->sta.ht_cap.ht_supported) { |
261 | ht_dbg(sta->sdata, | |
262 | "STA %pM erroneously requests BA session on tid %d w/o QoS\n", | |
263 | sta->sta.addr, tid); | |
264 | /* send a response anyway, it's an error case if we get here */ | |
265 | goto end_no_lock; | |
266 | } | |
267 | ||
c2c98fde | 268 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { |
0a214d3f JB |
269 | ht_dbg(sta->sdata, |
270 | "Suspend in progress - Denying ADDBA request (%pM tid %d)\n", | |
271 | sta->sta.addr, tid); | |
722f069a S |
272 | goto end_no_lock; |
273 | } | |
274 | ||
b8695a8f JB |
275 | /* sanity check for incoming parameters: |
276 | * check if configuration can support the BA policy | |
277 | * and if buffer size does not exceeds max value */ | |
278 | /* XXX: check own ht delayed BA capability?? */ | |
f64f9e71 JP |
279 | if (((ba_policy != 1) && |
280 | (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) || | |
281 | (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
b8695a8f | 282 | status = WLAN_STATUS_INVALID_QOS_PARAM; |
bdcbd8e0 JB |
283 | ht_dbg_ratelimited(sta->sdata, |
284 | "AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n", | |
08cf42e8 | 285 | sta->sta.addr, tid, ba_policy, buf_size); |
b8695a8f JB |
286 | goto end_no_lock; |
287 | } | |
288 | /* determine default buffer size */ | |
82694f76 LC |
289 | if (buf_size == 0) |
290 | buf_size = IEEE80211_MAX_AMPDU_BUF; | |
b8695a8f | 291 | |
df6ba5d8 LC |
292 | /* make sure the size doesn't exceed the maximum supported by the hw */ |
293 | if (buf_size > local->hw.max_rx_aggregation_subframes) | |
294 | buf_size = local->hw.max_rx_aggregation_subframes; | |
50ea05ef | 295 | params.buf_size = buf_size; |
b8695a8f JB |
296 | |
297 | /* examine state machine */ | |
a93e3644 | 298 | mutex_lock(&sta->ampdu_mlme.mtx); |
b8695a8f | 299 | |
a87f736d | 300 | if (sta->ampdu_mlme.tid_rx[tid]) { |
bdcbd8e0 JB |
301 | ht_dbg_ratelimited(sta->sdata, |
302 | "unexpected AddBA Req from %pM on tid %u\n", | |
08cf42e8 | 303 | sta->sta.addr, tid); |
15b4d843 AN |
304 | |
305 | /* delete existing Rx BA session on the same tid */ | |
306 | ___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, | |
307 | WLAN_STATUS_UNSPECIFIED_QOS, | |
308 | false); | |
b8695a8f JB |
309 | } |
310 | ||
311 | /* prepare A-MPDU MLME for Rx aggregation */ | |
dd318575 | 312 | tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL); |
d15b8459 | 313 | if (!tid_agg_rx) |
b8695a8f | 314 | goto end; |
b8695a8f | 315 | |
2bff8ebf CL |
316 | spin_lock_init(&tid_agg_rx->reorder_lock); |
317 | ||
a87f736d JB |
318 | /* rx timer */ |
319 | tid_agg_rx->session_timer.function = sta_rx_agg_session_timer_expired; | |
320 | tid_agg_rx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid]; | |
12d3952f | 321 | init_timer_deferrable(&tid_agg_rx->session_timer); |
b8695a8f | 322 | |
2bff8ebf CL |
323 | /* rx reorder timer */ |
324 | tid_agg_rx->reorder_timer.function = sta_rx_agg_reorder_timer_expired; | |
325 | tid_agg_rx->reorder_timer.data = (unsigned long)&sta->timer_to_tid[tid]; | |
326 | init_timer(&tid_agg_rx->reorder_timer); | |
327 | ||
b8695a8f JB |
328 | /* prepare reordering buffer */ |
329 | tid_agg_rx->reorder_buf = | |
83eb935e | 330 | kcalloc(buf_size, sizeof(struct sk_buff_head), GFP_KERNEL); |
4d050f1d | 331 | tid_agg_rx->reorder_time = |
dd318575 | 332 | kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL); |
4d050f1d | 333 | if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) { |
4d050f1d JM |
334 | kfree(tid_agg_rx->reorder_buf); |
335 | kfree(tid_agg_rx->reorder_time); | |
a87f736d | 336 | kfree(tid_agg_rx); |
b8695a8f JB |
337 | goto end; |
338 | } | |
339 | ||
83eb935e MK |
340 | for (i = 0; i < buf_size; i++) |
341 | __skb_queue_head_init(&tid_agg_rx->reorder_buf[i]); | |
342 | ||
50ea05ef | 343 | ret = drv_ampdu_action(local, sta->sdata, ¶ms); |
0a214d3f JB |
344 | ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n", |
345 | sta->sta.addr, tid, ret); | |
b8695a8f JB |
346 | if (ret) { |
347 | kfree(tid_agg_rx->reorder_buf); | |
a87f736d | 348 | kfree(tid_agg_rx->reorder_time); |
b8695a8f | 349 | kfree(tid_agg_rx); |
b8695a8f JB |
350 | goto end; |
351 | } | |
352 | ||
a87f736d | 353 | /* update data */ |
b8695a8f JB |
354 | tid_agg_rx->dialog_token = dialog_token; |
355 | tid_agg_rx->ssn = start_seq_num; | |
356 | tid_agg_rx->head_seq_num = start_seq_num; | |
357 | tid_agg_rx->buf_size = buf_size; | |
358 | tid_agg_rx->timeout = timeout; | |
359 | tid_agg_rx->stored_mpdu_num = 0; | |
4549cf2b | 360 | tid_agg_rx->auto_seq = auto_seq; |
b8695a8f | 361 | status = WLAN_STATUS_SUCCESS; |
a87f736d JB |
362 | |
363 | /* activate it for RX */ | |
cf778b00 | 364 | rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx); |
f955ebb4 | 365 | |
12d3952f | 366 | if (timeout) { |
f955ebb4 | 367 | mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout)); |
12d3952f FF |
368 | tid_agg_rx->last_rx = jiffies; |
369 | } | |
f955ebb4 | 370 | |
b8695a8f | 371 | end: |
a93e3644 | 372 | mutex_unlock(&sta->ampdu_mlme.mtx); |
b8695a8f JB |
373 | |
374 | end_no_lock: | |
08cf42e8 MK |
375 | if (tx) |
376 | ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid, | |
377 | dialog_token, status, 1, buf_size, | |
378 | timeout); | |
379 | } | |
380 | ||
381 | void ieee80211_process_addba_request(struct ieee80211_local *local, | |
382 | struct sta_info *sta, | |
383 | struct ieee80211_mgmt *mgmt, | |
384 | size_t len) | |
385 | { | |
386 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num; | |
387 | u8 dialog_token; | |
388 | ||
389 | /* extract session parameters from addba request frame */ | |
390 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
391 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
392 | start_seq_num = | |
393 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
394 | ||
395 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
396 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
397 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
398 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
399 | ||
400 | __ieee80211_start_rx_ba_session(sta, dialog_token, timeout, | |
401 | start_seq_num, ba_policy, tid, | |
4549cf2b | 402 | buf_size, true, false); |
08cf42e8 MK |
403 | } |
404 | ||
405 | void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, | |
406 | const u8 *addr, u16 tid) | |
407 | { | |
408 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
409 | struct ieee80211_local *local = sdata->local; | |
410 | struct ieee80211_rx_agg *rx_agg; | |
411 | struct sk_buff *skb = dev_alloc_skb(0); | |
412 | ||
413 | if (unlikely(!skb)) | |
414 | return; | |
415 | ||
416 | rx_agg = (struct ieee80211_rx_agg *) &skb->cb; | |
417 | memcpy(&rx_agg->addr, addr, ETH_ALEN); | |
418 | rx_agg->tid = tid; | |
419 | ||
420 | skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_START; | |
421 | skb_queue_tail(&sdata->skb_queue, skb); | |
422 | ieee80211_queue_work(&local->hw, &sdata->work); | |
423 | } | |
424 | EXPORT_SYMBOL(ieee80211_start_rx_ba_session_offl); | |
425 | ||
426 | void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, | |
427 | const u8 *addr, u16 tid) | |
428 | { | |
429 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
430 | struct ieee80211_local *local = sdata->local; | |
431 | struct ieee80211_rx_agg *rx_agg; | |
432 | struct sk_buff *skb = dev_alloc_skb(0); | |
433 | ||
434 | if (unlikely(!skb)) | |
435 | return; | |
436 | ||
437 | rx_agg = (struct ieee80211_rx_agg *) &skb->cb; | |
438 | memcpy(&rx_agg->addr, addr, ETH_ALEN); | |
439 | rx_agg->tid = tid; | |
440 | ||
441 | skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_STOP; | |
442 | skb_queue_tail(&sdata->skb_queue, skb); | |
443 | ieee80211_queue_work(&local->hw, &sdata->work); | |
b8695a8f | 444 | } |
08cf42e8 | 445 | EXPORT_SYMBOL(ieee80211_stop_rx_ba_session_offl); |