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 |
b8695a8f JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
73a72a81 JB |
16 | /** |
17 | * DOC: RX A-MPDU aggregation | |
18 | * | |
19 | * Aggregation on the RX side requires only implementing the | |
20 | * @ampdu_action callback that is invoked to start/stop any | |
21 | * block-ack sessions for RX aggregation. | |
22 | * | |
23 | * When RX aggregation is started by the peer, the driver is | |
24 | * notified via @ampdu_action function, with the | |
25 | * %IEEE80211_AMPDU_RX_START action, and may reject the request | |
26 | * in which case a negative response is sent to the peer, if it | |
27 | * accepts it a positive response is sent. | |
28 | * | |
29 | * While the session is active, the device/driver are required | |
30 | * to de-aggregate frames and pass them up one by one to mac80211, | |
31 | * which will handle the reorder buffer. | |
32 | * | |
33 | * When the aggregation session is stopped again by the peer or | |
34 | * ourselves, the driver's @ampdu_action function will be called | |
35 | * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the | |
36 | * call must not fail. | |
37 | */ | |
38 | ||
b8695a8f | 39 | #include <linux/ieee80211.h> |
5a0e3ad6 | 40 | #include <linux/slab.h> |
bc3b2d7f | 41 | #include <linux/export.h> |
b8695a8f JB |
42 | #include <net/mac80211.h> |
43 | #include "ieee80211_i.h" | |
24487981 | 44 | #include "driver-ops.h" |
b8695a8f | 45 | |
a87f736d JB |
46 | static void ieee80211_free_tid_rx(struct rcu_head *h) |
47 | { | |
48 | struct tid_ampdu_rx *tid_rx = | |
49 | container_of(h, struct tid_ampdu_rx, rcu_head); | |
50 | int i; | |
51 | ||
52 | for (i = 0; i < tid_rx->buf_size; i++) | |
83eb935e | 53 | __skb_queue_purge(&tid_rx->reorder_buf[i]); |
a87f736d JB |
54 | kfree(tid_rx->reorder_buf); |
55 | kfree(tid_rx->reorder_time); | |
56 | kfree(tid_rx); | |
57 | } | |
58 | ||
7c3b1dd8 | 59 | void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
53f73c09 | 60 | u16 initiator, u16 reason, bool tx) |
b8695a8f | 61 | { |
d75636ef | 62 | struct ieee80211_local *local = sta->local; |
098a6070 | 63 | struct tid_ampdu_rx *tid_rx; |
b8695a8f | 64 | |
a93e3644 | 65 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
098a6070 | 66 | |
40b275b6 JB |
67 | tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid], |
68 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
a87f736d | 69 | |
7c3b1dd8 | 70 | if (!tid_rx) |
b8695a8f | 71 | return; |
d75636ef | 72 | |
a9b3cd7f | 73 | RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL); |
b8695a8f | 74 | |
bdcbd8e0 JB |
75 | ht_dbg(sta->sdata, |
76 | "Rx BA session stop requested for %pM tid %u %s reason: %d\n", | |
77 | sta->sta.addr, tid, | |
78 | initiator == WLAN_BACK_RECIPIENT ? "recipient" : "inititator", | |
79 | (int)reason); | |
b8695a8f | 80 | |
12375ef9 | 81 | if (drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_STOP, |
0b01f030 | 82 | &sta->sta, tid, NULL, 0)) |
bdcbd8e0 | 83 | sdata_info(sta->sdata, |
0a214d3f JB |
84 | "HW problem - can not stop rx aggregation for %pM tid %d\n", |
85 | sta->sta.addr, tid); | |
b8695a8f | 86 | |
b8695a8f | 87 | /* check if this is a self generated aggregation halt */ |
53f73c09 | 88 | if (initiator == WLAN_BACK_RECIPIENT && tx) |
d75636ef | 89 | ieee80211_send_delba(sta->sdata, sta->sta.addr, |
a7f39f60 | 90 | tid, WLAN_BACK_RECIPIENT, reason); |
b8695a8f | 91 | |
7c3b1dd8 | 92 | del_timer_sync(&tid_rx->session_timer); |
a87f736d | 93 | |
788211d8 JB |
94 | /* make sure ieee80211_sta_reorder_release() doesn't re-arm the timer */ |
95 | spin_lock_bh(&tid_rx->reorder_lock); | |
96 | tid_rx->removed = true; | |
97 | spin_unlock_bh(&tid_rx->reorder_lock); | |
98 | del_timer_sync(&tid_rx->reorder_timer); | |
99 | ||
a87f736d | 100 | call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx); |
b8695a8f JB |
101 | } |
102 | ||
2aab4c27 | 103 | void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
53f73c09 | 104 | u16 initiator, u16 reason, bool tx) |
2aab4c27 | 105 | { |
a93e3644 | 106 | mutex_lock(&sta->ampdu_mlme.mtx); |
53f73c09 | 107 | ___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx); |
a93e3644 | 108 | mutex_unlock(&sta->ampdu_mlme.mtx); |
2aab4c27 JB |
109 | } |
110 | ||
f41ccd71 SL |
111 | void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, |
112 | const u8 *addr) | |
113 | { | |
114 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
0a557ed3 | 115 | struct sta_info *sta; |
f41ccd71 SL |
116 | int i; |
117 | ||
0a557ed3 | 118 | rcu_read_lock(); |
bc192f89 | 119 | sta = sta_info_get_bss(sdata, addr); |
0a557ed3 EP |
120 | if (!sta) { |
121 | rcu_read_unlock(); | |
122 | return; | |
123 | } | |
124 | ||
5a306f58 | 125 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
f41ccd71 SL |
126 | if (ba_rx_bitmap & BIT(i)) |
127 | set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested); | |
128 | ||
129 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); | |
0a557ed3 | 130 | rcu_read_unlock(); |
f41ccd71 SL |
131 | } |
132 | EXPORT_SYMBOL(ieee80211_stop_rx_ba_session); | |
133 | ||
b8695a8f JB |
134 | /* |
135 | * After accepting the AddBA Request we activated a timer, | |
136 | * resetting it after each frame that arrives from the originator. | |
b8695a8f JB |
137 | */ |
138 | static void sta_rx_agg_session_timer_expired(unsigned long data) | |
139 | { | |
140 | /* not an elegant detour, but there is no choice as the timer passes | |
141 | * only one argument, and various sta_info are needed here, so init | |
142 | * flow in sta_info_create gives the TID as data, while the timer_to_id | |
143 | * array gives the sta through container_of */ | |
144 | u8 *ptid = (u8 *)data; | |
145 | u8 *timer_to_id = ptid - *ptid; | |
146 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
147 | timer_to_tid[0]); | |
12d3952f FF |
148 | struct tid_ampdu_rx *tid_rx; |
149 | unsigned long timeout; | |
150 | ||
d8c7aae6 | 151 | rcu_read_lock(); |
12d3952f | 152 | tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[*ptid]); |
d8c7aae6 FF |
153 | if (!tid_rx) { |
154 | rcu_read_unlock(); | |
12d3952f | 155 | return; |
d8c7aae6 | 156 | } |
12d3952f FF |
157 | |
158 | timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout); | |
159 | if (time_is_after_jiffies(timeout)) { | |
160 | mod_timer(&tid_rx->session_timer, timeout); | |
d8c7aae6 | 161 | rcu_read_unlock(); |
12d3952f FF |
162 | return; |
163 | } | |
d8c7aae6 | 164 | rcu_read_unlock(); |
b8695a8f | 165 | |
0a214d3f JB |
166 | ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n", |
167 | sta->sta.addr, (u16)*ptid); | |
d63e9ae3 | 168 | |
7c3b1dd8 JB |
169 | set_bit(*ptid, sta->ampdu_mlme.tid_rx_timer_expired); |
170 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); | |
b8695a8f JB |
171 | } |
172 | ||
2bff8ebf CL |
173 | static void sta_rx_agg_reorder_timer_expired(unsigned long data) |
174 | { | |
175 | u8 *ptid = (u8 *)data; | |
176 | u8 *timer_to_id = ptid - *ptid; | |
177 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
178 | timer_to_tid[0]); | |
179 | ||
180 | rcu_read_lock(); | |
2bff8ebf | 181 | ieee80211_release_reorder_timeout(sta, *ptid); |
2bff8ebf CL |
182 | rcu_read_unlock(); |
183 | } | |
184 | ||
b8695a8f JB |
185 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
186 | u8 dialog_token, u16 status, u16 policy, | |
187 | u16 buf_size, u16 timeout) | |
188 | { | |
b8695a8f JB |
189 | struct ieee80211_local *local = sdata->local; |
190 | struct sk_buff *skb; | |
191 | struct ieee80211_mgmt *mgmt; | |
192 | u16 capab; | |
193 | ||
194 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 195 | if (!skb) |
b8695a8f | 196 | return; |
b8695a8f JB |
197 | |
198 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
199 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
200 | memset(mgmt, 0, 24); | |
201 | memcpy(mgmt->da, da, ETH_ALEN); | |
47846c9b | 202 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 203 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
204 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
205 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 206 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
207 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
208 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
209 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
210 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 211 | |
b8695a8f JB |
212 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
213 | IEEE80211_STYPE_ACTION); | |
214 | ||
215 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
216 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
217 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
218 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
219 | ||
220 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
221 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
222 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
223 | ||
224 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
225 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
226 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
227 | ||
62ae67be | 228 | ieee80211_tx_skb(sdata, skb); |
b8695a8f JB |
229 | } |
230 | ||
08cf42e8 MK |
231 | void __ieee80211_start_rx_ba_session(struct sta_info *sta, |
232 | u8 dialog_token, u16 timeout, | |
233 | u16 start_seq_num, u16 ba_policy, u16 tid, | |
4549cf2b | 234 | u16 buf_size, bool tx, bool auto_seq) |
b8695a8f | 235 | { |
08cf42e8 | 236 | struct ieee80211_local *local = sta->sdata->local; |
b8695a8f | 237 | struct tid_ampdu_rx *tid_agg_rx; |
83eb935e | 238 | int i, ret = -EOPNOTSUPP; |
08cf42e8 | 239 | u16 status = WLAN_STATUS_REQUEST_DECLINED; |
b8695a8f | 240 | |
8f9c77fc JB |
241 | if (!sta->sta.ht_cap.ht_supported) { |
242 | ht_dbg(sta->sdata, | |
243 | "STA %pM erroneously requests BA session on tid %d w/o QoS\n", | |
244 | sta->sta.addr, tid); | |
245 | /* send a response anyway, it's an error case if we get here */ | |
246 | goto end_no_lock; | |
247 | } | |
248 | ||
c2c98fde | 249 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { |
0a214d3f JB |
250 | ht_dbg(sta->sdata, |
251 | "Suspend in progress - Denying ADDBA request (%pM tid %d)\n", | |
252 | sta->sta.addr, tid); | |
722f069a S |
253 | goto end_no_lock; |
254 | } | |
255 | ||
b8695a8f JB |
256 | /* sanity check for incoming parameters: |
257 | * check if configuration can support the BA policy | |
258 | * and if buffer size does not exceeds max value */ | |
259 | /* XXX: check own ht delayed BA capability?? */ | |
f64f9e71 JP |
260 | if (((ba_policy != 1) && |
261 | (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) || | |
262 | (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
b8695a8f | 263 | status = WLAN_STATUS_INVALID_QOS_PARAM; |
bdcbd8e0 JB |
264 | ht_dbg_ratelimited(sta->sdata, |
265 | "AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n", | |
08cf42e8 | 266 | sta->sta.addr, tid, ba_policy, buf_size); |
b8695a8f JB |
267 | goto end_no_lock; |
268 | } | |
269 | /* determine default buffer size */ | |
82694f76 LC |
270 | if (buf_size == 0) |
271 | buf_size = IEEE80211_MAX_AMPDU_BUF; | |
b8695a8f | 272 | |
df6ba5d8 LC |
273 | /* make sure the size doesn't exceed the maximum supported by the hw */ |
274 | if (buf_size > local->hw.max_rx_aggregation_subframes) | |
275 | buf_size = local->hw.max_rx_aggregation_subframes; | |
b8695a8f JB |
276 | |
277 | /* examine state machine */ | |
a93e3644 | 278 | mutex_lock(&sta->ampdu_mlme.mtx); |
b8695a8f | 279 | |
a87f736d | 280 | if (sta->ampdu_mlme.tid_rx[tid]) { |
bdcbd8e0 JB |
281 | ht_dbg_ratelimited(sta->sdata, |
282 | "unexpected AddBA Req from %pM on tid %u\n", | |
08cf42e8 | 283 | sta->sta.addr, tid); |
15b4d843 AN |
284 | |
285 | /* delete existing Rx BA session on the same tid */ | |
286 | ___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, | |
287 | WLAN_STATUS_UNSPECIFIED_QOS, | |
288 | false); | |
b8695a8f JB |
289 | } |
290 | ||
291 | /* prepare A-MPDU MLME for Rx aggregation */ | |
dd318575 | 292 | tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL); |
d15b8459 | 293 | if (!tid_agg_rx) |
b8695a8f | 294 | goto end; |
b8695a8f | 295 | |
2bff8ebf CL |
296 | spin_lock_init(&tid_agg_rx->reorder_lock); |
297 | ||
a87f736d JB |
298 | /* rx timer */ |
299 | tid_agg_rx->session_timer.function = sta_rx_agg_session_timer_expired; | |
300 | tid_agg_rx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid]; | |
12d3952f | 301 | init_timer_deferrable(&tid_agg_rx->session_timer); |
b8695a8f | 302 | |
2bff8ebf CL |
303 | /* rx reorder timer */ |
304 | tid_agg_rx->reorder_timer.function = sta_rx_agg_reorder_timer_expired; | |
305 | tid_agg_rx->reorder_timer.data = (unsigned long)&sta->timer_to_tid[tid]; | |
306 | init_timer(&tid_agg_rx->reorder_timer); | |
307 | ||
b8695a8f JB |
308 | /* prepare reordering buffer */ |
309 | tid_agg_rx->reorder_buf = | |
83eb935e | 310 | kcalloc(buf_size, sizeof(struct sk_buff_head), GFP_KERNEL); |
4d050f1d | 311 | tid_agg_rx->reorder_time = |
dd318575 | 312 | kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL); |
4d050f1d | 313 | if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) { |
4d050f1d JM |
314 | kfree(tid_agg_rx->reorder_buf); |
315 | kfree(tid_agg_rx->reorder_time); | |
a87f736d | 316 | kfree(tid_agg_rx); |
b8695a8f JB |
317 | goto end; |
318 | } | |
319 | ||
83eb935e MK |
320 | for (i = 0; i < buf_size; i++) |
321 | __skb_queue_head_init(&tid_agg_rx->reorder_buf[i]); | |
322 | ||
12375ef9 | 323 | ret = drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_START, |
0b01f030 | 324 | &sta->sta, tid, &start_seq_num, 0); |
0a214d3f JB |
325 | ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n", |
326 | sta->sta.addr, tid, ret); | |
b8695a8f JB |
327 | if (ret) { |
328 | kfree(tid_agg_rx->reorder_buf); | |
a87f736d | 329 | kfree(tid_agg_rx->reorder_time); |
b8695a8f | 330 | kfree(tid_agg_rx); |
b8695a8f JB |
331 | goto end; |
332 | } | |
333 | ||
a87f736d | 334 | /* update data */ |
b8695a8f JB |
335 | tid_agg_rx->dialog_token = dialog_token; |
336 | tid_agg_rx->ssn = start_seq_num; | |
337 | tid_agg_rx->head_seq_num = start_seq_num; | |
338 | tid_agg_rx->buf_size = buf_size; | |
339 | tid_agg_rx->timeout = timeout; | |
340 | tid_agg_rx->stored_mpdu_num = 0; | |
4549cf2b | 341 | tid_agg_rx->auto_seq = auto_seq; |
b8695a8f | 342 | status = WLAN_STATUS_SUCCESS; |
a87f736d JB |
343 | |
344 | /* activate it for RX */ | |
cf778b00 | 345 | rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx); |
f955ebb4 | 346 | |
12d3952f | 347 | if (timeout) { |
f955ebb4 | 348 | mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout)); |
12d3952f FF |
349 | tid_agg_rx->last_rx = jiffies; |
350 | } | |
f955ebb4 | 351 | |
b8695a8f | 352 | end: |
a93e3644 | 353 | mutex_unlock(&sta->ampdu_mlme.mtx); |
b8695a8f JB |
354 | |
355 | end_no_lock: | |
08cf42e8 MK |
356 | if (tx) |
357 | ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid, | |
358 | dialog_token, status, 1, buf_size, | |
359 | timeout); | |
360 | } | |
361 | ||
362 | void ieee80211_process_addba_request(struct ieee80211_local *local, | |
363 | struct sta_info *sta, | |
364 | struct ieee80211_mgmt *mgmt, | |
365 | size_t len) | |
366 | { | |
367 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num; | |
368 | u8 dialog_token; | |
369 | ||
370 | /* extract session parameters from addba request frame */ | |
371 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
372 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
373 | start_seq_num = | |
374 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
375 | ||
376 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
377 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
378 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
379 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
380 | ||
381 | __ieee80211_start_rx_ba_session(sta, dialog_token, timeout, | |
382 | start_seq_num, ba_policy, tid, | |
4549cf2b | 383 | buf_size, true, false); |
08cf42e8 MK |
384 | } |
385 | ||
386 | void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, | |
387 | const u8 *addr, u16 tid) | |
388 | { | |
389 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
390 | struct ieee80211_local *local = sdata->local; | |
391 | struct ieee80211_rx_agg *rx_agg; | |
392 | struct sk_buff *skb = dev_alloc_skb(0); | |
393 | ||
394 | if (unlikely(!skb)) | |
395 | return; | |
396 | ||
397 | rx_agg = (struct ieee80211_rx_agg *) &skb->cb; | |
398 | memcpy(&rx_agg->addr, addr, ETH_ALEN); | |
399 | rx_agg->tid = tid; | |
400 | ||
401 | skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_START; | |
402 | skb_queue_tail(&sdata->skb_queue, skb); | |
403 | ieee80211_queue_work(&local->hw, &sdata->work); | |
404 | } | |
405 | EXPORT_SYMBOL(ieee80211_start_rx_ba_session_offl); | |
406 | ||
407 | void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, | |
408 | const u8 *addr, u16 tid) | |
409 | { | |
410 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
411 | struct ieee80211_local *local = sdata->local; | |
412 | struct ieee80211_rx_agg *rx_agg; | |
413 | struct sk_buff *skb = dev_alloc_skb(0); | |
414 | ||
415 | if (unlikely(!skb)) | |
416 | return; | |
417 | ||
418 | rx_agg = (struct ieee80211_rx_agg *) &skb->cb; | |
419 | memcpy(&rx_agg->addr, addr, ETH_ALEN); | |
420 | rx_agg->tid = tid; | |
421 | ||
422 | skb->pkt_type = IEEE80211_SDATA_QUEUE_RX_AGG_STOP; | |
423 | skb_queue_tail(&sdata->skb_queue, skb); | |
424 | ieee80211_queue_work(&local->hw, &sdata->work); | |
b8695a8f | 425 | } |
08cf42e8 | 426 | EXPORT_SYMBOL(ieee80211_stop_rx_ba_session_offl); |