Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 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> |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 9 | * Copyright 2007-2010, Intel Corporation |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 10 | * Copyright(c) 2015 Intel Deutschland GmbH |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 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 | |
| 17 | #include <linux/ieee80211.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 19 | #include <linux/export.h> |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 20 | #include <net/mac80211.h> |
| 21 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 22 | #include "driver-ops.h" |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 23 | #include "wme.h" |
| 24 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 25 | /** |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 26 | * DOC: TX A-MPDU aggregation |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 27 | * |
| 28 | * Aggregation on the TX side requires setting the hardware flag |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 29 | * %IEEE80211_HW_AMPDU_AGGREGATION. The driver will then be handed |
| 30 | * packets with a flag indicating A-MPDU aggregation. The driver |
| 31 | * or device is responsible for actually aggregating the frames, |
| 32 | * as well as deciding how many and which to aggregate. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 33 | * |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 34 | * When TX aggregation is started by some subsystem (usually the rate |
| 35 | * control algorithm would be appropriate) by calling the |
| 36 | * ieee80211_start_tx_ba_session() function, the driver will be |
| 37 | * notified via its @ampdu_action function, with the |
| 38 | * %IEEE80211_AMPDU_TX_START action. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 39 | * |
| 40 | * In response to that, the driver is later required to call the |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 41 | * ieee80211_start_tx_ba_cb_irqsafe() function, which will really |
| 42 | * start the aggregation session after the peer has also responded. |
| 43 | * If the peer responds negatively, the session will be stopped |
| 44 | * again right away. Note that it is possible for the aggregation |
| 45 | * session to be stopped before the driver has indicated that it |
| 46 | * is done setting it up, in which case it must not indicate the |
| 47 | * setup completion. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 48 | * |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 49 | * Also note that, since we also need to wait for a response from |
| 50 | * the peer, the driver is notified of the completion of the |
| 51 | * handshake by the %IEEE80211_AMPDU_TX_OPERATIONAL action to the |
| 52 | * @ampdu_action callback. |
| 53 | * |
| 54 | * Similarly, when the aggregation session is stopped by the peer |
| 55 | * or something calling ieee80211_stop_tx_ba_session(), the driver's |
| 56 | * @ampdu_action function will be called with the action |
| 57 | * %IEEE80211_AMPDU_TX_STOP. In this case, the call must not fail, |
| 58 | * and the driver must later call ieee80211_stop_tx_ba_cb_irqsafe(). |
Yogesh Ashok Powar | 42624d4 | 2011-12-08 14:56:15 +0530 | [diff] [blame] | 59 | * Note that the sta can get destroyed before the BA tear down is |
| 60 | * complete. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 61 | */ |
| 62 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 63 | static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, |
| 64 | const u8 *da, u16 tid, |
| 65 | u8 dialog_token, u16 start_seq_num, |
| 66 | u16 agg_size, u16 timeout) |
| 67 | { |
| 68 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 69 | struct sk_buff *skb; |
| 70 | struct ieee80211_mgmt *mgmt; |
| 71 | u16 capab; |
| 72 | |
| 73 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
| 74 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 75 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 76 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 77 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 78 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 79 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 80 | memset(mgmt, 0, 24); |
| 81 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 82 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 83 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 84 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 85 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 86 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 87 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 88 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 89 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 90 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 91 | |
| 92 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 93 | IEEE80211_STYPE_ACTION); |
| 94 | |
| 95 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); |
| 96 | |
| 97 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| 98 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; |
| 99 | |
| 100 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; |
Emmanuel Grumbach | e3abc8f | 2015-08-16 11:13:22 +0300 | [diff] [blame] | 101 | capab = (u16)(1 << 0); /* bit 0 A-MSDU support */ |
| 102 | capab |= (u16)(1 << 1); /* bit 1 aggregation policy */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 103 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
| 104 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ |
| 105 | |
| 106 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); |
| 107 | |
| 108 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); |
| 109 | mgmt->u.action.u.addba_req.start_seq_num = |
| 110 | cpu_to_le16(start_seq_num << 4); |
| 111 | |
Karl Beldan | c6e1332 | 2014-01-23 20:06:34 +0100 | [diff] [blame] | 112 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 113 | } |
| 114 | |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 115 | void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 116 | { |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 117 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 118 | struct ieee80211_local *local = sdata->local; |
| 119 | struct sk_buff *skb; |
| 120 | struct ieee80211_bar *bar; |
| 121 | u16 bar_control = 0; |
| 122 | |
| 123 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 124 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 125 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 126 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 127 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 128 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); |
| 129 | memset(bar, 0, sizeof(*bar)); |
| 130 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| 131 | IEEE80211_STYPE_BACK_REQ); |
| 132 | memcpy(bar->ra, ra, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 133 | memcpy(bar->ta, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 134 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
| 135 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; |
Helmut Schaa | c1407b6 | 2011-08-11 16:17:41 +0200 | [diff] [blame] | 136 | bar_control |= (u16)(tid << IEEE80211_BAR_CTRL_TID_INFO_SHIFT); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 137 | bar->control = cpu_to_le16(bar_control); |
| 138 | bar->start_seq_num = cpu_to_le16(ssn); |
| 139 | |
Christian Lamparter | 2f7916f | 2012-07-07 15:13:08 +0200 | [diff] [blame] | 140 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
| 141 | IEEE80211_TX_CTL_REQ_TX_STATUS; |
Helmut Schaa | cf6bb79 | 2011-12-15 10:18:34 +0100 | [diff] [blame] | 142 | ieee80211_tx_skb_tid(sdata, skb, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 143 | } |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 144 | EXPORT_SYMBOL(ieee80211_send_bar); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 145 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 146 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
| 147 | struct tid_ampdu_tx *tid_tx) |
| 148 | { |
| 149 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
| 150 | lockdep_assert_held(&sta->lock); |
| 151 | rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx); |
| 152 | } |
| 153 | |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 154 | /* |
| 155 | * When multiple aggregation sessions on multiple stations |
| 156 | * are being created/destroyed simultaneously, we need to |
| 157 | * refcount the global queue stop caused by that in order |
| 158 | * to not get into a situation where one of the aggregation |
| 159 | * setup or teardown re-enables queues before the other is |
| 160 | * ready to handle that. |
| 161 | * |
| 162 | * These two functions take care of this issue by keeping |
| 163 | * a global "agg_queue_stop" refcount. |
| 164 | */ |
| 165 | static void __acquires(agg_queue) |
| 166 | ieee80211_stop_queue_agg(struct ieee80211_sub_if_data *sdata, int tid) |
| 167 | { |
| 168 | int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)]; |
| 169 | |
Luciano Coelho | cca07b0 | 2014-06-13 16:30:05 +0300 | [diff] [blame] | 170 | /* we do refcounting here, so don't use the queue reason refcounting */ |
| 171 | |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 172 | if (atomic_inc_return(&sdata->local->agg_queue_stop[queue]) == 1) |
| 173 | ieee80211_stop_queue_by_reason( |
| 174 | &sdata->local->hw, queue, |
Luciano Coelho | cca07b0 | 2014-06-13 16:30:05 +0300 | [diff] [blame] | 175 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION, |
| 176 | false); |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 177 | __acquire(agg_queue); |
| 178 | } |
| 179 | |
| 180 | static void __releases(agg_queue) |
| 181 | ieee80211_wake_queue_agg(struct ieee80211_sub_if_data *sdata, int tid) |
| 182 | { |
| 183 | int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)]; |
| 184 | |
| 185 | if (atomic_dec_return(&sdata->local->agg_queue_stop[queue]) == 0) |
| 186 | ieee80211_wake_queue_by_reason( |
| 187 | &sdata->local->hw, queue, |
Luciano Coelho | cca07b0 | 2014-06-13 16:30:05 +0300 | [diff] [blame] | 188 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION, |
| 189 | false); |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 190 | __release(agg_queue); |
| 191 | } |
| 192 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 193 | static void |
| 194 | ieee80211_agg_stop_txq(struct sta_info *sta, int tid) |
| 195 | { |
| 196 | struct ieee80211_txq *txq = sta->sta.txq[tid]; |
| 197 | struct txq_info *txqi; |
| 198 | |
| 199 | if (!txq) |
| 200 | return; |
| 201 | |
| 202 | txqi = to_txq_info(txq); |
| 203 | |
| 204 | /* Lock here to protect against further seqno updates on dequeue */ |
| 205 | spin_lock_bh(&txqi->queue.lock); |
| 206 | set_bit(IEEE80211_TXQ_STOP, &txqi->flags); |
| 207 | spin_unlock_bh(&txqi->queue.lock); |
| 208 | } |
| 209 | |
| 210 | static void |
| 211 | ieee80211_agg_start_txq(struct sta_info *sta, int tid, bool enable) |
| 212 | { |
| 213 | struct ieee80211_txq *txq = sta->sta.txq[tid]; |
| 214 | struct txq_info *txqi; |
| 215 | |
| 216 | if (!txq) |
| 217 | return; |
| 218 | |
| 219 | txqi = to_txq_info(txq); |
| 220 | |
| 221 | if (enable) |
| 222 | set_bit(IEEE80211_TXQ_AMPDU, &txqi->flags); |
| 223 | else |
| 224 | clear_bit(IEEE80211_TXQ_AMPDU, &txqi->flags); |
| 225 | |
| 226 | clear_bit(IEEE80211_TXQ_STOP, &txqi->flags); |
| 227 | drv_wake_tx_queue(sta->sdata->local, txqi); |
| 228 | } |
| 229 | |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 230 | /* |
| 231 | * splice packets from the STA's pending to the local pending, |
| 232 | * requires a call to ieee80211_agg_splice_finish later |
| 233 | */ |
| 234 | static void __acquires(agg_queue) |
| 235 | ieee80211_agg_splice_packets(struct ieee80211_sub_if_data *sdata, |
| 236 | struct tid_ampdu_tx *tid_tx, u16 tid) |
| 237 | { |
| 238 | struct ieee80211_local *local = sdata->local; |
| 239 | int queue = sdata->vif.hw_queue[ieee80211_ac_from_tid(tid)]; |
| 240 | unsigned long flags; |
| 241 | |
| 242 | ieee80211_stop_queue_agg(sdata, tid); |
| 243 | |
| 244 | if (WARN(!tid_tx, |
| 245 | "TID %d gone but expected when splicing aggregates from the pending queue\n", |
| 246 | tid)) |
| 247 | return; |
| 248 | |
| 249 | if (!skb_queue_empty(&tid_tx->pending)) { |
| 250 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
| 251 | /* copy over remaining packets */ |
| 252 | skb_queue_splice_tail_init(&tid_tx->pending, |
| 253 | &local->pending[queue]); |
| 254 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | static void __releases(agg_queue) |
| 259 | ieee80211_agg_splice_finish(struct ieee80211_sub_if_data *sdata, u16 tid) |
| 260 | { |
| 261 | ieee80211_wake_queue_agg(sdata, tid); |
| 262 | } |
| 263 | |
| 264 | static void ieee80211_remove_tid_tx(struct sta_info *sta, int tid) |
| 265 | { |
| 266 | struct tid_ampdu_tx *tid_tx; |
| 267 | |
| 268 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
| 269 | lockdep_assert_held(&sta->lock); |
| 270 | |
| 271 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 272 | |
| 273 | /* |
| 274 | * When we get here, the TX path will not be lockless any more wrt. |
| 275 | * aggregation, since the OPERATIONAL bit has long been cleared. |
| 276 | * Thus it will block on getting the lock, if it occurs. So if we |
| 277 | * stop the queue now, we will not get any more packets, and any |
| 278 | * that might be being processed will wait for us here, thereby |
| 279 | * guaranteeing that no packets go to the tid_tx pending queue any |
| 280 | * more. |
| 281 | */ |
| 282 | |
| 283 | ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid); |
| 284 | |
| 285 | /* future packets must not find the tid_tx struct any more */ |
| 286 | ieee80211_assign_tid_tx(sta, tid, NULL); |
| 287 | |
| 288 | ieee80211_agg_splice_finish(sta->sdata, tid); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 289 | ieee80211_agg_start_txq(sta, tid, false); |
Johannes Berg | 30bf5f1 | 2012-12-28 09:43:03 +0100 | [diff] [blame] | 290 | |
| 291 | kfree_rcu(tid_tx, rcu_head); |
| 292 | } |
| 293 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 294 | int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 295 | enum ieee80211_agg_stop_reason reason) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 296 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 297 | struct ieee80211_local *local = sta->local; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 298 | struct tid_ampdu_tx *tid_tx; |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 299 | struct ieee80211_ampdu_params params = { |
| 300 | .sta = &sta->sta, |
| 301 | .tid = tid, |
| 302 | .buf_size = 0, |
| 303 | .amsdu = false, |
| 304 | .timeout = 0, |
| 305 | .ssn = 0, |
| 306 | }; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 307 | int ret; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 308 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 309 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 310 | |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 311 | switch (reason) { |
| 312 | case AGG_STOP_DECLINED: |
| 313 | case AGG_STOP_LOCAL_REQUEST: |
| 314 | case AGG_STOP_PEER_REQUEST: |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 315 | params.action = IEEE80211_AMPDU_TX_STOP_CONT; |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 316 | break; |
| 317 | case AGG_STOP_DESTROY_STA: |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 318 | params.action = IEEE80211_AMPDU_TX_STOP_FLUSH; |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 319 | break; |
| 320 | default: |
| 321 | WARN_ON_ONCE(1); |
| 322 | return -EINVAL; |
| 323 | } |
| 324 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 325 | spin_lock_bh(&sta->lock); |
| 326 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 327 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 328 | if (!tid_tx) { |
| 329 | spin_unlock_bh(&sta->lock); |
| 330 | return -ENOENT; |
| 331 | } |
| 332 | |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 333 | /* |
| 334 | * if we're already stopping ignore any new requests to stop |
| 335 | * unless we're destroying it in which case notify the driver |
| 336 | */ |
Johannes Berg | 24f50a9 | 2011-11-24 20:06:14 +0100 | [diff] [blame] | 337 | if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 338 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 339 | if (reason != AGG_STOP_DESTROY_STA) |
| 340 | return -EALREADY; |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 341 | params.action = IEEE80211_AMPDU_TX_STOP_FLUSH_CONT; |
| 342 | ret = drv_ampdu_action(local, sta->sdata, ¶ms); |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 343 | WARN_ON_ONCE(ret); |
Johannes Berg | 8147dc7 | 2013-01-18 23:47:05 +0100 | [diff] [blame] | 344 | return 0; |
Johannes Berg | 24f50a9 | 2011-11-24 20:06:14 +0100 | [diff] [blame] | 345 | } |
| 346 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 347 | if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
| 348 | /* not even started yet! */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 349 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 350 | spin_unlock_bh(&sta->lock); |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 351 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 352 | return 0; |
| 353 | } |
| 354 | |
Johannes Berg | 24f50a9 | 2011-11-24 20:06:14 +0100 | [diff] [blame] | 355 | set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state); |
| 356 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 357 | spin_unlock_bh(&sta->lock); |
| 358 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 359 | ht_dbg(sta->sdata, "Tx BA session stop requested for %pM tid %u\n", |
| 360 | sta->sta.addr, tid); |
Johannes Berg | 827d42c | 2009-11-22 12:28:41 +0100 | [diff] [blame] | 361 | |
Johannes Berg | 44271488 | 2010-10-05 21:40:33 +0200 | [diff] [blame] | 362 | del_timer_sync(&tid_tx->addba_resp_timer); |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 363 | del_timer_sync(&tid_tx->session_timer); |
Johannes Berg | 44271488 | 2010-10-05 21:40:33 +0200 | [diff] [blame] | 364 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 365 | /* |
| 366 | * After this packets are no longer handed right through |
| 367 | * to the driver but are put onto tid_tx->pending instead, |
| 368 | * with locking to ensure proper access. |
| 369 | */ |
| 370 | clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Vasanthakumar Thiagarajan | 736708b | 2009-06-09 14:11:46 +0530 | [diff] [blame] | 371 | |
Emmanuel Grumbach | 2a1e0fd | 2011-11-27 15:29:44 +0200 | [diff] [blame] | 372 | /* |
| 373 | * There might be a few packets being processed right now (on |
| 374 | * another CPU) that have already gotten past the aggregation |
| 375 | * check when it was still OPERATIONAL and consequently have |
| 376 | * IEEE80211_TX_CTL_AMPDU set. In that case, this code might |
| 377 | * call into the driver at the same time or even before the |
| 378 | * TX paths calls into it, which could confuse the driver. |
| 379 | * |
| 380 | * Wait for all currently running TX paths to finish before |
| 381 | * telling the driver. New packets will not go through since |
| 382 | * the aggregation session is no longer OPERATIONAL. |
| 383 | */ |
| 384 | synchronize_net(); |
| 385 | |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 386 | tid_tx->stop_initiator = reason == AGG_STOP_PEER_REQUEST ? |
| 387 | WLAN_BACK_RECIPIENT : |
| 388 | WLAN_BACK_INITIATOR; |
| 389 | tid_tx->tx_stop = reason == AGG_STOP_LOCAL_REQUEST; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 390 | |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 391 | ret = drv_ampdu_action(local, sta->sdata, ¶ms); |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 392 | |
| 393 | /* HW shall not deny going back to legacy */ |
| 394 | if (WARN_ON(ret)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 395 | /* |
| 396 | * We may have pending packets get stuck in this case... |
| 397 | * Not bothering with a workaround for now. |
| 398 | */ |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 399 | } |
| 400 | |
Johannes Berg | 8147dc7 | 2013-01-18 23:47:05 +0100 | [diff] [blame] | 401 | /* |
| 402 | * In the case of AGG_STOP_DESTROY_STA, the driver won't |
| 403 | * necessarily call ieee80211_stop_tx_ba_cb(), so this may |
| 404 | * seem like we can leave the tid_tx data pending forever. |
| 405 | * This is true, in a way, but "forever" is only until the |
| 406 | * station struct is actually destroyed. In the meantime, |
| 407 | * leaving it around ensures that we don't transmit packets |
| 408 | * to the driver on this TID which might confuse it. |
| 409 | */ |
Johannes Berg | 18b559d | 2012-07-18 13:51:25 +0200 | [diff] [blame] | 410 | |
| 411 | return 0; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 412 | } |
| 413 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 414 | /* |
| 415 | * After sending add Block Ack request we activated a timer until |
| 416 | * add Block Ack response will arrive from the recipient. |
| 417 | * If this timer expires sta_addba_resp_timer_expired will be executed. |
| 418 | */ |
| 419 | static void sta_addba_resp_timer_expired(unsigned long data) |
| 420 | { |
| 421 | /* not an elegant detour, but there is no choice as the timer passes |
| 422 | * only one argument, and both sta_info and TID are needed, so init |
| 423 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
| 424 | * array gives the sta through container_of */ |
| 425 | u16 tid = *(u8 *)data; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 426 | struct sta_info *sta = container_of((void *)data, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 427 | struct sta_info, timer_to_tid[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 428 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 429 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 430 | /* check if the TID waits for addBA response */ |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 431 | rcu_read_lock(); |
| 432 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 433 | if (!tid_tx || |
| 434 | test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 435 | rcu_read_unlock(); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 436 | ht_dbg(sta->sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 437 | "timer expired on %pM tid %d but we are not (or no longer) expecting addBA response there\n", |
| 438 | sta->sta.addr, tid); |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 439 | return; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 440 | } |
| 441 | |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 442 | ht_dbg(sta->sdata, "addBA response timer expired on %pM tid %d\n", |
| 443 | sta->sta.addr, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 444 | |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 445 | ieee80211_stop_tx_ba_session(&sta->sta, tid); |
| 446 | rcu_read_unlock(); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 449 | void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid) |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 450 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 451 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 452 | struct ieee80211_local *local = sta->local; |
| 453 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 454 | struct ieee80211_ampdu_params params = { |
| 455 | .sta = &sta->sta, |
| 456 | .action = IEEE80211_AMPDU_TX_START, |
| 457 | .tid = tid, |
| 458 | .buf_size = 0, |
| 459 | .amsdu = false, |
| 460 | .timeout = 0, |
| 461 | }; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 462 | int ret; |
| 463 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 464 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 465 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 466 | /* |
Johannes Berg | 15062e6 | 2011-12-07 09:02:21 +0100 | [diff] [blame] | 467 | * Start queuing up packets for this aggregation session. |
| 468 | * We're going to release them once the driver is OK with |
| 469 | * that. |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 470 | */ |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 471 | clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
| 472 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 473 | ieee80211_agg_stop_txq(sta, tid); |
| 474 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 475 | /* |
Johannes Berg | 15062e6 | 2011-12-07 09:02:21 +0100 | [diff] [blame] | 476 | * Make sure no packets are being processed. This ensures that |
| 477 | * we have a valid starting sequence number and that in-flight |
| 478 | * packets have been flushed out and no packets for this TID |
| 479 | * will go into the driver during the ampdu_action call. |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 480 | */ |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 481 | synchronize_net(); |
| 482 | |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 483 | params.ssn = sta->tid_seq[tid] >> 4; |
| 484 | ret = drv_ampdu_action(local, sdata, ¶ms); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 485 | if (ret) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 486 | ht_dbg(sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 487 | "BA request denied - HW unavailable for %pM tid %d\n", |
| 488 | sta->sta.addr, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 489 | spin_lock_bh(&sta->lock); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 490 | ieee80211_agg_splice_packets(sdata, tid_tx, tid); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 491 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 492 | ieee80211_agg_splice_finish(sdata, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 493 | spin_unlock_bh(&sta->lock); |
| 494 | |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 495 | ieee80211_agg_start_txq(sta, tid, false); |
| 496 | |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 497 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 498 | return; |
| 499 | } |
| 500 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 501 | /* activate the timer for the recipient's addBA response */ |
| 502 | mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL); |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 503 | ht_dbg(sdata, "activated addBA response timer on %pM tid %d\n", |
| 504 | sta->sta.addr, tid); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 505 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 506 | spin_lock_bh(&sta->lock); |
Nikolay Martynov | 84381b4 | 2011-12-17 19:39:35 -0500 | [diff] [blame] | 507 | sta->ampdu_mlme.last_addba_req_time[tid] = jiffies; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 508 | sta->ampdu_mlme.addba_req_num[tid]++; |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 509 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 510 | |
| 511 | /* send AddBA request */ |
| 512 | ieee80211_send_addba_request(sdata, sta->sta.addr, tid, |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 513 | tid_tx->dialog_token, params.ssn, |
Gregory Greenman | ac06219 | 2015-11-17 10:24:38 +0200 | [diff] [blame] | 514 | IEEE80211_MAX_AMPDU_BUF, |
Johannes Berg | 5dd36bc | 2011-01-18 13:52:23 +0100 | [diff] [blame] | 515 | tid_tx->timeout); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 516 | } |
| 517 | |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 518 | /* |
| 519 | * After accepting the AddBA Response we activated a timer, |
| 520 | * resetting it after each frame that we send. |
| 521 | */ |
| 522 | static void sta_tx_agg_session_timer_expired(unsigned long data) |
| 523 | { |
| 524 | /* not an elegant detour, but there is no choice as the timer passes |
| 525 | * only one argument, and various sta_info are needed here, so init |
| 526 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
| 527 | * array gives the sta through container_of */ |
| 528 | u8 *ptid = (u8 *)data; |
| 529 | u8 *timer_to_id = ptid - *ptid; |
| 530 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, |
| 531 | timer_to_tid[0]); |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 532 | struct tid_ampdu_tx *tid_tx; |
| 533 | unsigned long timeout; |
| 534 | |
Johannes Berg | 9e73dee | 2012-05-07 17:57:36 +0200 | [diff] [blame] | 535 | rcu_read_lock(); |
| 536 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[*ptid]); |
| 537 | if (!tid_tx || test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 538 | rcu_read_unlock(); |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 539 | return; |
Johannes Berg | 9e73dee | 2012-05-07 17:57:36 +0200 | [diff] [blame] | 540 | } |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 541 | |
| 542 | timeout = tid_tx->last_tx + TU_TO_JIFFIES(tid_tx->timeout); |
| 543 | if (time_is_after_jiffies(timeout)) { |
| 544 | mod_timer(&tid_tx->session_timer, timeout); |
Johannes Berg | 9e73dee | 2012-05-07 17:57:36 +0200 | [diff] [blame] | 545 | rcu_read_unlock(); |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 546 | return; |
| 547 | } |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 548 | |
Johannes Berg | 9e73dee | 2012-05-07 17:57:36 +0200 | [diff] [blame] | 549 | rcu_read_unlock(); |
| 550 | |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 551 | ht_dbg(sta->sdata, "tx session timer expired on %pM tid %d\n", |
| 552 | sta->sta.addr, (u16)*ptid); |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 553 | |
| 554 | ieee80211_stop_tx_ba_session(&sta->sta, *ptid); |
| 555 | } |
| 556 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 557 | int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, |
| 558 | u16 timeout) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 559 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 560 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 561 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 562 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 563 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 564 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 565 | |
Johannes Berg | 8f9c77f | 2015-03-09 11:13:04 +0100 | [diff] [blame] | 566 | trace_api_start_tx_ba_session(pubsta, tid); |
| 567 | |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 568 | if (WARN(sta->reserved_tid == tid, |
| 569 | "Requested to start BA session on reserved tid=%d", tid)) |
| 570 | return -EINVAL; |
| 571 | |
Johannes Berg | 8f9c77f | 2015-03-09 11:13:04 +0100 | [diff] [blame] | 572 | if (!pubsta->ht_cap.ht_supported) |
| 573 | return -EINVAL; |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 574 | |
Chaitanya | 50c16e2 | 2012-12-07 12:19:34 +0530 | [diff] [blame] | 575 | if (WARN_ON_ONCE(!local->ops->ampdu_action)) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 576 | return -EINVAL; |
| 577 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 578 | if ((tid >= IEEE80211_NUM_TIDS) || |
Johannes Berg | 30686bf | 2015-06-02 21:39:54 +0200 | [diff] [blame] | 579 | !ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) || |
| 580 | ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 581 | return -EINVAL; |
| 582 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 583 | ht_dbg(sdata, "Open BA session requested for %pM tid %u\n", |
| 584 | pubsta->addr, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 585 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 586 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 587 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 588 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 589 | sdata->vif.type != NL80211_IFTYPE_AP && |
| 590 | sdata->vif.type != NL80211_IFTYPE_ADHOC) |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 591 | return -EINVAL; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 592 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 593 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 594 | ht_dbg(sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 595 | "BA sessions blocked - Denying BA session request %pM tid %d\n", |
| 596 | sta->sta.addr, tid); |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 597 | return -EINVAL; |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 598 | } |
| 599 | |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 600 | /* |
| 601 | * 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a |
| 602 | * member of an IBSS, and has no other existing Block Ack agreement |
| 603 | * with the recipient STA, then the initiating STA shall transmit a |
| 604 | * Probe Request frame to the recipient STA and shall not transmit an |
| 605 | * ADDBA Request frame unless it receives a Probe Response frame |
| 606 | * from the recipient within dot11ADDBAFailureTimeout. |
| 607 | * |
| 608 | * The probe request mechanism for ADDBA is currently not implemented, |
| 609 | * but we only build up Block Ack session with HT STAs. This information |
| 610 | * is set when we receive a bss info from a probe response or a beacon. |
| 611 | */ |
| 612 | if (sta->sdata->vif.type == NL80211_IFTYPE_ADHOC && |
| 613 | !sta->sta.ht_cap.ht_supported) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 614 | ht_dbg(sdata, |
| 615 | "BA request denied - IBSS STA %pM does not advertise HT support\n", |
| 616 | pubsta->addr); |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 617 | return -EINVAL; |
| 618 | } |
| 619 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 620 | spin_lock_bh(&sta->lock); |
| 621 | |
| 622 | /* we have tried too many times, receiver does not want A-MPDU */ |
| 623 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
| 624 | ret = -EBUSY; |
| 625 | goto err_unlock_sta; |
| 626 | } |
| 627 | |
Nikolay Martynov | 84381b4 | 2011-12-17 19:39:35 -0500 | [diff] [blame] | 628 | /* |
| 629 | * if we have tried more than HT_AGG_BURST_RETRIES times we |
| 630 | * will spread our requests in time to avoid stalling connection |
| 631 | * for too long |
| 632 | */ |
| 633 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_BURST_RETRIES && |
| 634 | time_before(jiffies, sta->ampdu_mlme.last_addba_req_time[tid] + |
| 635 | HT_AGG_RETRIES_PERIOD)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 636 | ht_dbg(sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 637 | "BA request denied - waiting a grace period after %d failed requests on %pM tid %u\n", |
| 638 | sta->ampdu_mlme.addba_req_num[tid], sta->sta.addr, tid); |
Nikolay Martynov | 84381b4 | 2011-12-17 19:39:35 -0500 | [diff] [blame] | 639 | ret = -EBUSY; |
| 640 | goto err_unlock_sta; |
| 641 | } |
| 642 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 643 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 644 | /* check if the TID is not in aggregation flow already */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 645 | if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 646 | ht_dbg(sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 647 | "BA request denied - session is not idle on %pM tid %u\n", |
| 648 | sta->sta.addr, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 649 | ret = -EAGAIN; |
| 650 | goto err_unlock_sta; |
| 651 | } |
| 652 | |
| 653 | /* prepare A-MPDU MLME for Tx aggregation */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 654 | tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); |
| 655 | if (!tid_tx) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 656 | ret = -ENOMEM; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 657 | goto err_unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 658 | } |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 659 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 660 | skb_queue_head_init(&tid_tx->pending); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 661 | __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 662 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 663 | tid_tx->timeout = timeout; |
| 664 | |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 665 | /* response timer */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 666 | tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired; |
| 667 | tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
| 668 | init_timer(&tid_tx->addba_resp_timer); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 669 | |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 670 | /* tx timer */ |
| 671 | tid_tx->session_timer.function = sta_tx_agg_session_timer_expired; |
| 672 | tid_tx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 673 | init_timer_deferrable(&tid_tx->session_timer); |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 674 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 675 | /* assign a dialog token */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 676 | sta->ampdu_mlme.dialog_token_allocator++; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 677 | tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 678 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 679 | /* |
| 680 | * Finally, assign it to the start array; the work item will |
| 681 | * collect it and move it to the normal array. |
| 682 | */ |
| 683 | sta->ampdu_mlme.tid_start_tx[tid] = tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 684 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 685 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
Johannes Berg | 51a0d38 | 2010-05-31 12:00:12 +0200 | [diff] [blame] | 686 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 687 | /* this flow continues off the work */ |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 688 | err_unlock_sta: |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 689 | spin_unlock_bh(&sta->lock); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 690 | return ret; |
| 691 | } |
| 692 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); |
| 693 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 694 | static void ieee80211_agg_tx_operational(struct ieee80211_local *local, |
| 695 | struct sta_info *sta, u16 tid) |
| 696 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 697 | struct tid_ampdu_tx *tid_tx; |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 698 | struct ieee80211_ampdu_params params = { |
| 699 | .sta = &sta->sta, |
| 700 | .action = IEEE80211_AMPDU_TX_OPERATIONAL, |
| 701 | .tid = tid, |
| 702 | .timeout = 0, |
| 703 | .ssn = 0, |
| 704 | }; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 705 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 706 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 707 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 708 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 709 | params.buf_size = tid_tx->buf_size; |
| 710 | params.amsdu = tid_tx->amsdu; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 711 | |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 712 | ht_dbg(sta->sdata, "Aggregation is on for %pM tid %d\n", |
| 713 | sta->sta.addr, tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 714 | |
Sara Sharon | 50ea05e | 2015-12-30 16:06:04 +0200 | [diff] [blame] | 715 | drv_ampdu_action(local, sta->sdata, ¶ms); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 716 | |
| 717 | /* |
| 718 | * synchronize with TX path, while splicing the TX path |
| 719 | * should block so it won't put more packets onto pending. |
| 720 | */ |
| 721 | spin_lock_bh(&sta->lock); |
| 722 | |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 723 | ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 724 | /* |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 725 | * Now mark as operational. This will be visible |
| 726 | * in the TX path, and lets it go lock-free in |
| 727 | * the common case. |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 728 | */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 729 | set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Johannes Berg | 3a25a8c | 2012-04-03 16:28:50 +0200 | [diff] [blame] | 730 | ieee80211_agg_splice_finish(sta->sdata, tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 731 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 732 | spin_unlock_bh(&sta->lock); |
Felix Fietkau | ba8c3d6 | 2015-03-27 21:30:37 +0100 | [diff] [blame] | 733 | |
| 734 | ieee80211_agg_start_txq(sta, tid, true); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 735 | } |
| 736 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 737 | void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 738 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 739 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 740 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 741 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 742 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 743 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 744 | trace_api_start_tx_ba_cb(sdata, ra, tid); |
| 745 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 746 | if (tid >= IEEE80211_NUM_TIDS) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 747 | ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n", |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 748 | tid, IEEE80211_NUM_TIDS); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 749 | return; |
| 750 | } |
| 751 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 752 | mutex_lock(&local->sta_mtx); |
Felix Fietkau | bc192f8 | 2011-11-23 21:09:49 +0700 | [diff] [blame] | 753 | sta = sta_info_get_bss(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 754 | if (!sta) { |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 755 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 756 | ht_dbg(sdata, "Could not find station: %pM\n", ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 757 | return; |
| 758 | } |
| 759 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 760 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 761 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 762 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 763 | if (WARN_ON(!tid_tx)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 764 | ht_dbg(sdata, "addBA was not requested!\n"); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 765 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 766 | } |
| 767 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 768 | if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state))) |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 769 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 770 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 771 | if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 772 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 773 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 774 | unlock: |
| 775 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 776 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 777 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 778 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 779 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 780 | const u8 *ra, u16 tid) |
| 781 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 782 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 783 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 784 | struct ieee80211_ra_tid *ra_tid; |
| 785 | struct sk_buff *skb = dev_alloc_skb(0); |
| 786 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 787 | if (unlikely(!skb)) |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 788 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 789 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 790 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 791 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 792 | ra_tid->tid = tid; |
| 793 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 794 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START; |
| 795 | skb_queue_tail(&sdata->skb_queue, skb); |
| 796 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 797 | } |
| 798 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); |
| 799 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 800 | int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 801 | enum ieee80211_agg_stop_reason reason) |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 802 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 803 | int ret; |
| 804 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 805 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 806 | |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 807 | ret = ___ieee80211_stop_tx_ba_session(sta, tid, reason); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 808 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 809 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 810 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 811 | return ret; |
| 812 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 813 | |
Johannes Berg | 6a8579d | 2010-05-27 14:41:07 +0200 | [diff] [blame] | 814 | int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 815 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 816 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 817 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 818 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 819 | struct tid_ampdu_tx *tid_tx; |
| 820 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 821 | |
Johannes Berg | 6a8579d | 2010-05-27 14:41:07 +0200 | [diff] [blame] | 822 | trace_api_stop_tx_ba_session(pubsta, tid); |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 823 | |
Johannes Berg | 4253119 | 2009-11-20 09:15:51 +0100 | [diff] [blame] | 824 | if (!local->ops->ampdu_action) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 825 | return -EINVAL; |
| 826 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 827 | if (tid >= IEEE80211_NUM_TIDS) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 828 | return -EINVAL; |
| 829 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 830 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 831 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 832 | |
| 833 | if (!tid_tx) { |
| 834 | ret = -ENOENT; |
| 835 | goto unlock; |
| 836 | } |
| 837 | |
Liad Kaufman | b6da911 | 2014-11-19 13:47:38 +0200 | [diff] [blame] | 838 | WARN(sta->reserved_tid == tid, |
| 839 | "Requested to stop BA session on reserved tid=%d", tid); |
| 840 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 841 | if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 842 | /* already in progress stopping it */ |
| 843 | ret = 0; |
| 844 | goto unlock; |
| 845 | } |
| 846 | |
| 847 | set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); |
| 848 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
| 849 | |
| 850 | unlock: |
| 851 | spin_unlock_bh(&sta->lock); |
| 852 | return ret; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 853 | } |
| 854 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); |
| 855 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 856 | void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 857 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 858 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 859 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 860 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 861 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 2c15888 | 2015-03-12 19:28:31 +0100 | [diff] [blame] | 862 | bool send_delba = false; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 863 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 864 | trace_api_stop_tx_ba_cb(sdata, ra, tid); |
| 865 | |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 866 | if (tid >= IEEE80211_NUM_TIDS) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 867 | ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n", |
Johannes Berg | 5a306f5 | 2012-11-14 23:22:21 +0100 | [diff] [blame] | 868 | tid, IEEE80211_NUM_TIDS); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 869 | return; |
| 870 | } |
| 871 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 872 | ht_dbg(sdata, "Stopping Tx BA session for %pM tid %d\n", ra, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 873 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 874 | mutex_lock(&local->sta_mtx); |
| 875 | |
Felix Fietkau | bc192f8 | 2011-11-23 21:09:49 +0700 | [diff] [blame] | 876 | sta = sta_info_get_bss(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 877 | if (!sta) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 878 | ht_dbg(sdata, "Could not find station: %pM\n", ra); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 879 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 880 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 881 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 882 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 883 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 884 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 885 | |
| 886 | if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 887 | ht_dbg(sdata, |
| 888 | "unexpected callback to A-MPDU stop for %pM tid %d\n", |
| 889 | sta->sta.addr, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 890 | goto unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 891 | } |
| 892 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 893 | if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR && tid_tx->tx_stop) |
Johannes Berg | 2c15888 | 2015-03-12 19:28:31 +0100 | [diff] [blame] | 894 | send_delba = true; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 895 | |
Johannes Berg | faec12e | 2012-07-18 14:12:44 +0200 | [diff] [blame] | 896 | ieee80211_remove_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 897 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 898 | unlock_sta: |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 899 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 2c15888 | 2015-03-12 19:28:31 +0100 | [diff] [blame] | 900 | |
| 901 | if (send_delba) |
| 902 | ieee80211_send_delba(sdata, ra, tid, |
| 903 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
| 904 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 905 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 906 | unlock: |
| 907 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 908 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 909 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 910 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 911 | const u8 *ra, u16 tid) |
| 912 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 913 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 914 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 915 | struct ieee80211_ra_tid *ra_tid; |
| 916 | struct sk_buff *skb = dev_alloc_skb(0); |
| 917 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 918 | if (unlikely(!skb)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 919 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 920 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 921 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 922 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 923 | ra_tid->tid = tid; |
| 924 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 925 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP; |
| 926 | skb_queue_tail(&sdata->skb_queue, skb); |
| 927 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 928 | } |
| 929 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); |
| 930 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 931 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 932 | void ieee80211_process_addba_resp(struct ieee80211_local *local, |
| 933 | struct sta_info *sta, |
| 934 | struct ieee80211_mgmt *mgmt, |
| 935 | size_t len) |
| 936 | { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 937 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 938 | u16 capab, tid; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 939 | u8 buf_size; |
Emmanuel Grumbach | e3abc8f | 2015-08-16 11:13:22 +0300 | [diff] [blame] | 940 | bool amsdu; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 941 | |
| 942 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); |
Emmanuel Grumbach | e3abc8f | 2015-08-16 11:13:22 +0300 | [diff] [blame] | 943 | amsdu = capab & IEEE80211_ADDBA_PARAM_AMSDU_MASK; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 944 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 945 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; |
Gregory Greenman | ac06219 | 2015-11-17 10:24:38 +0200 | [diff] [blame] | 946 | buf_size = min(buf_size, local->hw.max_tx_aggregation_subframes); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 947 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 948 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 949 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 950 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 951 | if (!tid_tx) |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 952 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 953 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 954 | if (mgmt->u.action.u.addba_resp.dialog_token != tid_tx->dialog_token) { |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 955 | ht_dbg(sta->sdata, "wrong addBA response token, %pM tid %d\n", |
| 956 | sta->sta.addr, tid); |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 957 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 958 | } |
| 959 | |
Nikolay Martynov | d305a65 | 2011-11-28 09:18:00 +0100 | [diff] [blame] | 960 | del_timer_sync(&tid_tx->addba_resp_timer); |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 961 | |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 962 | ht_dbg(sta->sdata, "switched off addBA timer for %pM tid %d\n", |
| 963 | sta->sta.addr, tid); |
Nikolay Martynov | d305a65 | 2011-11-28 09:18:00 +0100 | [diff] [blame] | 964 | |
| 965 | /* |
| 966 | * addba_resp_timer may have fired before we got here, and |
| 967 | * caused WANT_STOP to be set. If the stop then was already |
| 968 | * processed further, STOPPING might be set. |
| 969 | */ |
| 970 | if (test_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state) || |
| 971 | test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 972 | ht_dbg(sta->sdata, |
Johannes Berg | 0a214d3 | 2013-01-16 10:39:44 +0100 | [diff] [blame] | 973 | "got addBA resp for %pM tid %d but we already gave up\n", |
| 974 | sta->sta.addr, tid); |
Nikolay Martynov | d305a65 | 2011-11-28 09:18:00 +0100 | [diff] [blame] | 975 | goto out; |
| 976 | } |
| 977 | |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 978 | /* |
| 979 | * IEEE 802.11-2007 7.3.1.14: |
| 980 | * In an ADDBA Response frame, when the Status Code field |
| 981 | * is set to 0, the Buffer Size subfield is set to a value |
| 982 | * of at least 1. |
| 983 | */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 984 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 985 | == WLAN_STATUS_SUCCESS && buf_size) { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 986 | if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED, |
| 987 | &tid_tx->state)) { |
| 988 | /* ignore duplicate response */ |
| 989 | goto out; |
| 990 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 991 | |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 992 | tid_tx->buf_size = buf_size; |
Emmanuel Grumbach | e3abc8f | 2015-08-16 11:13:22 +0300 | [diff] [blame] | 993 | tid_tx->amsdu = amsdu; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 994 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 995 | if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 996 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 997 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 998 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 999 | |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 1000 | if (tid_tx->timeout) { |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1001 | mod_timer(&tid_tx->session_timer, |
| 1002 | TU_TO_EXP_TIME(tid_tx->timeout)); |
Felix Fietkau | 12d3952f | 2012-03-18 22:58:06 +0100 | [diff] [blame] | 1003 | tid_tx->last_tx = jiffies; |
| 1004 | } |
Nikolay Martynov | 285fa69 | 2011-11-22 21:50:28 -0500 | [diff] [blame] | 1005 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 1006 | } else { |
Johannes Berg | c82c4a8 | 2012-07-18 13:31:31 +0200 | [diff] [blame] | 1007 | ___ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_DECLINED); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 1008 | } |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 1009 | |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 1010 | out: |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 1011 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 1012 | } |