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 |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 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 | |
| 16 | #include <linux/ieee80211.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 18 | #include <net/mac80211.h> |
| 19 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 20 | #include "driver-ops.h" |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 21 | #include "wme.h" |
| 22 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 23 | /** |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 24 | * DOC: TX A-MPDU aggregation |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 25 | * |
| 26 | * Aggregation on the TX side requires setting the hardware flag |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 27 | * %IEEE80211_HW_AMPDU_AGGREGATION. The driver will then be handed |
| 28 | * packets with a flag indicating A-MPDU aggregation. The driver |
| 29 | * or device is responsible for actually aggregating the frames, |
| 30 | * as well as deciding how many and which to aggregate. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 31 | * |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 32 | * When TX aggregation is started by some subsystem (usually the rate |
| 33 | * control algorithm would be appropriate) by calling the |
| 34 | * ieee80211_start_tx_ba_session() function, the driver will be |
| 35 | * notified via its @ampdu_action function, with the |
| 36 | * %IEEE80211_AMPDU_TX_START action. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 37 | * |
| 38 | * In response to that, the driver is later required to call the |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 39 | * ieee80211_start_tx_ba_cb_irqsafe() function, which will really |
| 40 | * start the aggregation session after the peer has also responded. |
| 41 | * If the peer responds negatively, the session will be stopped |
| 42 | * again right away. Note that it is possible for the aggregation |
| 43 | * session to be stopped before the driver has indicated that it |
| 44 | * is done setting it up, in which case it must not indicate the |
| 45 | * setup completion. |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 46 | * |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 47 | * Also note that, since we also need to wait for a response from |
| 48 | * the peer, the driver is notified of the completion of the |
| 49 | * handshake by the %IEEE80211_AMPDU_TX_OPERATIONAL action to the |
| 50 | * @ampdu_action callback. |
| 51 | * |
| 52 | * Similarly, when the aggregation session is stopped by the peer |
| 53 | * or something calling ieee80211_stop_tx_ba_session(), the driver's |
| 54 | * @ampdu_action function will be called with the action |
| 55 | * %IEEE80211_AMPDU_TX_STOP. In this case, the call must not fail, |
| 56 | * and the driver must later call ieee80211_stop_tx_ba_cb_irqsafe(). |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 57 | */ |
| 58 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 59 | static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, |
| 60 | const u8 *da, u16 tid, |
| 61 | u8 dialog_token, u16 start_seq_num, |
| 62 | u16 agg_size, u16 timeout) |
| 63 | { |
| 64 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 65 | struct sk_buff *skb; |
| 66 | struct ieee80211_mgmt *mgmt; |
| 67 | u16 capab; |
| 68 | |
| 69 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
| 70 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 71 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 72 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 73 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 74 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 75 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 76 | memset(mgmt, 0, 24); |
| 77 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 78 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 79 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
| 80 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 81 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 82 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 83 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 84 | |
| 85 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 86 | IEEE80211_STYPE_ACTION); |
| 87 | |
| 88 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); |
| 89 | |
| 90 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| 91 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; |
| 92 | |
| 93 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; |
| 94 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ |
| 95 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
| 96 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ |
| 97 | |
| 98 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); |
| 99 | |
| 100 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); |
| 101 | mgmt->u.action.u.addba_req.start_seq_num = |
| 102 | cpu_to_le16(start_seq_num << 4); |
| 103 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 104 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
| 108 | { |
| 109 | struct ieee80211_local *local = sdata->local; |
| 110 | struct sk_buff *skb; |
| 111 | struct ieee80211_bar *bar; |
| 112 | u16 bar_control = 0; |
| 113 | |
| 114 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 115 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 116 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 117 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 118 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 119 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); |
| 120 | memset(bar, 0, sizeof(*bar)); |
| 121 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| 122 | IEEE80211_STYPE_BACK_REQ); |
| 123 | memcpy(bar->ra, ra, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 124 | memcpy(bar->ta, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 125 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
| 126 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; |
Helmut Schaa | c1407b6 | 2011-08-11 16:17:41 +0200 | [diff] [blame] | 127 | bar_control |= (u16)(tid << IEEE80211_BAR_CTRL_TID_INFO_SHIFT); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 128 | bar->control = cpu_to_le16(bar_control); |
| 129 | bar->start_seq_num = cpu_to_le16(ssn); |
| 130 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 131 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 132 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 133 | } |
| 134 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 135 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
| 136 | struct tid_ampdu_tx *tid_tx) |
| 137 | { |
| 138 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
| 139 | lockdep_assert_held(&sta->lock); |
| 140 | rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx); |
| 141 | } |
| 142 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 143 | int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 144 | enum ieee80211_back_parties initiator, |
| 145 | bool tx) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 146 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 147 | struct ieee80211_local *local = sta->local; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 148 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 149 | int ret; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 150 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 151 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 152 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 153 | spin_lock_bh(&sta->lock); |
| 154 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 155 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 156 | if (!tid_tx) { |
| 157 | spin_unlock_bh(&sta->lock); |
| 158 | return -ENOENT; |
| 159 | } |
| 160 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 161 | if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
| 162 | /* not even started yet! */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 163 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 164 | spin_unlock_bh(&sta->lock); |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 165 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 166 | return 0; |
| 167 | } |
| 168 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 169 | spin_unlock_bh(&sta->lock); |
| 170 | |
Johannes Berg | 827d42c | 2009-11-22 12:28:41 +0100 | [diff] [blame] | 171 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 172 | printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n", |
| 173 | sta->sta.addr, tid); |
| 174 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 175 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 176 | set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state); |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 177 | |
Johannes Berg | 44271488 | 2010-10-05 21:40:33 +0200 | [diff] [blame] | 178 | del_timer_sync(&tid_tx->addba_resp_timer); |
| 179 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 180 | /* |
| 181 | * After this packets are no longer handed right through |
| 182 | * to the driver but are put onto tid_tx->pending instead, |
| 183 | * with locking to ensure proper access. |
| 184 | */ |
| 185 | clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Vasanthakumar Thiagarajan | 736708b | 2009-06-09 14:11:46 +0530 | [diff] [blame] | 186 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 187 | tid_tx->stop_initiator = initiator; |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 188 | tid_tx->tx_stop = tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 189 | |
Johannes Berg | 12375ef | 2009-11-25 20:30:31 +0100 | [diff] [blame] | 190 | ret = drv_ampdu_action(local, sta->sdata, |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 191 | IEEE80211_AMPDU_TX_STOP, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 192 | &sta->sta, tid, NULL, 0); |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 193 | |
| 194 | /* HW shall not deny going back to legacy */ |
| 195 | if (WARN_ON(ret)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 196 | /* |
| 197 | * We may have pending packets get stuck in this case... |
| 198 | * Not bothering with a workaround for now. |
| 199 | */ |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | return ret; |
| 203 | } |
| 204 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 205 | /* |
| 206 | * After sending add Block Ack request we activated a timer until |
| 207 | * add Block Ack response will arrive from the recipient. |
| 208 | * If this timer expires sta_addba_resp_timer_expired will be executed. |
| 209 | */ |
| 210 | static void sta_addba_resp_timer_expired(unsigned long data) |
| 211 | { |
| 212 | /* not an elegant detour, but there is no choice as the timer passes |
| 213 | * only one argument, and both sta_info and TID are needed, so init |
| 214 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
| 215 | * array gives the sta through container_of */ |
| 216 | u16 tid = *(u8 *)data; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 217 | struct sta_info *sta = container_of((void *)data, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 218 | struct sta_info, timer_to_tid[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 219 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 220 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 221 | /* check if the TID waits for addBA response */ |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 222 | rcu_read_lock(); |
| 223 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 224 | if (!tid_tx || |
| 225 | test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 226 | rcu_read_unlock(); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 227 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 228 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
Johannes Berg | 67e0f39 | 2010-04-19 11:03:13 +0200 | [diff] [blame] | 229 | "(or no longer) expecting addBA response there\n", |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 230 | tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 231 | #endif |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 232 | return; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 236 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
| 237 | #endif |
| 238 | |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 239 | ieee80211_stop_tx_ba_session(&sta->sta, tid); |
| 240 | rcu_read_unlock(); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 241 | } |
| 242 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 243 | static inline int ieee80211_ac_from_tid(int tid) |
| 244 | { |
| 245 | return ieee802_1d_to_ac[tid & 7]; |
| 246 | } |
| 247 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 248 | /* |
| 249 | * When multiple aggregation sessions on multiple stations |
| 250 | * are being created/destroyed simultaneously, we need to |
| 251 | * refcount the global queue stop caused by that in order |
| 252 | * to not get into a situation where one of the aggregation |
| 253 | * setup or teardown re-enables queues before the other is |
| 254 | * ready to handle that. |
| 255 | * |
| 256 | * These two functions take care of this issue by keeping |
| 257 | * a global "agg_queue_stop" refcount. |
| 258 | */ |
| 259 | static void __acquires(agg_queue) |
| 260 | ieee80211_stop_queue_agg(struct ieee80211_local *local, int tid) |
| 261 | { |
| 262 | int queue = ieee80211_ac_from_tid(tid); |
| 263 | |
| 264 | if (atomic_inc_return(&local->agg_queue_stop[queue]) == 1) |
| 265 | ieee80211_stop_queue_by_reason( |
| 266 | &local->hw, queue, |
| 267 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION); |
| 268 | __acquire(agg_queue); |
| 269 | } |
| 270 | |
| 271 | static void __releases(agg_queue) |
| 272 | ieee80211_wake_queue_agg(struct ieee80211_local *local, int tid) |
| 273 | { |
| 274 | int queue = ieee80211_ac_from_tid(tid); |
| 275 | |
| 276 | if (atomic_dec_return(&local->agg_queue_stop[queue]) == 0) |
| 277 | ieee80211_wake_queue_by_reason( |
| 278 | &local->hw, queue, |
| 279 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION); |
| 280 | __release(agg_queue); |
| 281 | } |
| 282 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 283 | 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] | 284 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 285 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 286 | struct ieee80211_local *local = sta->local; |
| 287 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 288 | u16 start_seq_num; |
| 289 | int ret; |
| 290 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 291 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 292 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 293 | /* |
| 294 | * While we're asking the driver about the aggregation, |
| 295 | * stop the AC queue so that we don't have to worry |
| 296 | * about frames that came in while we were doing that, |
| 297 | * which would require us to put them to the AC pending |
| 298 | * afterwards which just makes the code more complex. |
| 299 | */ |
| 300 | ieee80211_stop_queue_agg(local, tid); |
| 301 | |
| 302 | clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
| 303 | |
| 304 | /* |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 305 | * make sure no packets are being processed to get |
| 306 | * valid starting sequence number |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 307 | */ |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 308 | synchronize_net(); |
| 309 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 310 | start_seq_num = sta->tid_seq[tid] >> 4; |
| 311 | |
| 312 | ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 313 | &sta->sta, tid, &start_seq_num, 0); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 314 | if (ret) { |
| 315 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 316 | printk(KERN_DEBUG "BA request denied - HW unavailable for" |
| 317 | " tid %d\n", tid); |
| 318 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 319 | spin_lock_bh(&sta->lock); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 320 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 321 | spin_unlock_bh(&sta->lock); |
| 322 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 323 | ieee80211_wake_queue_agg(local, tid); |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 324 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 325 | return; |
| 326 | } |
| 327 | |
| 328 | /* we can take packets again now */ |
| 329 | ieee80211_wake_queue_agg(local, tid); |
| 330 | |
| 331 | /* activate the timer for the recipient's addBA response */ |
| 332 | mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL); |
| 333 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 334 | printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); |
| 335 | #endif |
| 336 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 337 | spin_lock_bh(&sta->lock); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 338 | sta->ampdu_mlme.addba_req_num[tid]++; |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 339 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 340 | |
| 341 | /* send AddBA request */ |
| 342 | ieee80211_send_addba_request(sdata, sta->sta.addr, tid, |
| 343 | tid_tx->dialog_token, start_seq_num, |
Johannes Berg | 5dd36bc | 2011-01-18 13:52:23 +0100 | [diff] [blame] | 344 | local->hw.max_tx_aggregation_subframes, |
| 345 | tid_tx->timeout); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 346 | } |
| 347 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 348 | int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, |
| 349 | u16 timeout) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 350 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 351 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 352 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 353 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 354 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 355 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 356 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 357 | trace_api_start_tx_ba_session(pubsta, tid); |
| 358 | |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 359 | if (WARN_ON(!local->ops->ampdu_action)) |
| 360 | return -EINVAL; |
| 361 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 362 | if ((tid >= STA_TID_NUM) || |
Arik Nemtsov | edf6b78 | 2011-08-30 09:32:38 +0300 | [diff] [blame^] | 363 | !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) || |
| 364 | (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 365 | return -EINVAL; |
| 366 | |
| 367 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 368 | printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n", |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 369 | pubsta->addr, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 370 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 371 | |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 372 | /* |
| 373 | * The aggregation code is not prepared to handle |
| 374 | * anything but STA/AP due to the BSSID handling. |
| 375 | * IBSS could work in the code but isn't supported |
| 376 | * by drivers or the standard. |
| 377 | */ |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 378 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 379 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 380 | sdata->vif.type != NL80211_IFTYPE_AP) |
| 381 | return -EINVAL; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 382 | |
Johannes Berg | 618f356 | 2010-04-06 11:18:46 +0200 | [diff] [blame] | 383 | if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) { |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 384 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Johannes Berg | 2a41905 | 2010-06-10 10:21:29 +0200 | [diff] [blame] | 385 | printk(KERN_DEBUG "BA sessions blocked. " |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 386 | "Denying BA session request\n"); |
| 387 | #endif |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 388 | return -EINVAL; |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 389 | } |
| 390 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 391 | spin_lock_bh(&sta->lock); |
| 392 | |
| 393 | /* we have tried too many times, receiver does not want A-MPDU */ |
| 394 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
| 395 | ret = -EBUSY; |
| 396 | goto err_unlock_sta; |
| 397 | } |
| 398 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 399 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 400 | /* check if the TID is not in aggregation flow already */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 401 | if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 402 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 403 | printk(KERN_DEBUG "BA request denied - session is not " |
| 404 | "idle on tid %u\n", tid); |
| 405 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 406 | ret = -EAGAIN; |
| 407 | goto err_unlock_sta; |
| 408 | } |
| 409 | |
| 410 | /* prepare A-MPDU MLME for Tx aggregation */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 411 | tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); |
| 412 | if (!tid_tx) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 413 | ret = -ENOMEM; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 414 | goto err_unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 415 | } |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 416 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 417 | skb_queue_head_init(&tid_tx->pending); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 418 | __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 419 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 420 | tid_tx->timeout = timeout; |
| 421 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 422 | /* Tx timer */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 423 | tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired; |
| 424 | tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
| 425 | init_timer(&tid_tx->addba_resp_timer); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 426 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 427 | /* assign a dialog token */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 428 | sta->ampdu_mlme.dialog_token_allocator++; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 429 | tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 430 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 431 | /* |
| 432 | * Finally, assign it to the start array; the work item will |
| 433 | * collect it and move it to the normal array. |
| 434 | */ |
| 435 | sta->ampdu_mlme.tid_start_tx[tid] = tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 436 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 437 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
Johannes Berg | 51a0d38 | 2010-05-31 12:00:12 +0200 | [diff] [blame] | 438 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 439 | /* this flow continues off the work */ |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 440 | err_unlock_sta: |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 441 | spin_unlock_bh(&sta->lock); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 442 | return ret; |
| 443 | } |
| 444 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); |
| 445 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 446 | /* |
| 447 | * splice packets from the STA's pending to the local pending, |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 448 | * requires a call to ieee80211_agg_splice_finish later |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 449 | */ |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 450 | static void __acquires(agg_queue) |
| 451 | ieee80211_agg_splice_packets(struct ieee80211_local *local, |
| 452 | struct tid_ampdu_tx *tid_tx, u16 tid) |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 453 | { |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 454 | int queue = ieee80211_ac_from_tid(tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 455 | unsigned long flags; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 456 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 457 | ieee80211_stop_queue_agg(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 458 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 459 | if (WARN(!tid_tx, "TID %d gone but expected when splicing aggregates" |
| 460 | " from the pending queue\n", tid)) |
Luis R. Rodriguez | 416fbdf | 2009-08-11 13:10:33 -0700 | [diff] [blame] | 461 | return; |
| 462 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 463 | if (!skb_queue_empty(&tid_tx->pending)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 464 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 465 | /* copy over remaining packets */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 466 | skb_queue_splice_tail_init(&tid_tx->pending, |
| 467 | &local->pending[queue]); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 468 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 469 | } |
| 470 | } |
| 471 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 472 | static void __releases(agg_queue) |
| 473 | ieee80211_agg_splice_finish(struct ieee80211_local *local, u16 tid) |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 474 | { |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 475 | ieee80211_wake_queue_agg(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 476 | } |
| 477 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 478 | static void ieee80211_agg_tx_operational(struct ieee80211_local *local, |
| 479 | struct sta_info *sta, u16 tid) |
| 480 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 481 | struct tid_ampdu_tx *tid_tx; |
| 482 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 483 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 484 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 485 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 486 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 487 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 488 | printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 489 | #endif |
| 490 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 491 | drv_ampdu_action(local, sta->sdata, |
| 492 | IEEE80211_AMPDU_TX_OPERATIONAL, |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 493 | &sta->sta, tid, NULL, tid_tx->buf_size); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 494 | |
| 495 | /* |
| 496 | * synchronize with TX path, while splicing the TX path |
| 497 | * should block so it won't put more packets onto pending. |
| 498 | */ |
| 499 | spin_lock_bh(&sta->lock); |
| 500 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 501 | ieee80211_agg_splice_packets(local, tid_tx, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 502 | /* |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 503 | * Now mark as operational. This will be visible |
| 504 | * in the TX path, and lets it go lock-free in |
| 505 | * the common case. |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 506 | */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 507 | set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 508 | ieee80211_agg_splice_finish(local, tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 509 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 510 | spin_unlock_bh(&sta->lock); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 511 | } |
| 512 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 513 | 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] | 514 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 515 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 516 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 517 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 518 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 519 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 520 | trace_api_start_tx_ba_cb(sdata, ra, tid); |
| 521 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 522 | if (tid >= STA_TID_NUM) { |
| 523 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 524 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
| 525 | tid, STA_TID_NUM); |
| 526 | #endif |
| 527 | return; |
| 528 | } |
| 529 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 530 | mutex_lock(&local->sta_mtx); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 531 | sta = sta_info_get(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 532 | if (!sta) { |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 533 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 534 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 535 | printk(KERN_DEBUG "Could not find station: %pM\n", ra); |
| 536 | #endif |
| 537 | return; |
| 538 | } |
| 539 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 540 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 541 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 542 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 543 | if (WARN_ON(!tid_tx)) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 544 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 545 | printk(KERN_DEBUG "addBA was not requested!\n"); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 546 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 547 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 548 | } |
| 549 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 550 | 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] | 551 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 552 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 553 | if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 554 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 555 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 556 | unlock: |
| 557 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 558 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 559 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 560 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 561 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 562 | const u8 *ra, u16 tid) |
| 563 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 564 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 565 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 566 | struct ieee80211_ra_tid *ra_tid; |
| 567 | struct sk_buff *skb = dev_alloc_skb(0); |
| 568 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 569 | if (unlikely(!skb)) |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 570 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 571 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 572 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 573 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 574 | ra_tid->tid = tid; |
| 575 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 576 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START; |
| 577 | skb_queue_tail(&sdata->skb_queue, skb); |
| 578 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 579 | } |
| 580 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); |
| 581 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 582 | int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 583 | enum ieee80211_back_parties initiator, |
| 584 | bool tx) |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 585 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 586 | int ret; |
| 587 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 588 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 589 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 590 | ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator, tx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 591 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 592 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 593 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 594 | return ret; |
| 595 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 596 | |
Johannes Berg | 6a8579d | 2010-05-27 14:41:07 +0200 | [diff] [blame] | 597 | int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 598 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 599 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 600 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 601 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 602 | struct tid_ampdu_tx *tid_tx; |
| 603 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 604 | |
Johannes Berg | 6a8579d | 2010-05-27 14:41:07 +0200 | [diff] [blame] | 605 | trace_api_stop_tx_ba_session(pubsta, tid); |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 606 | |
Johannes Berg | 4253119 | 2009-11-20 09:15:51 +0100 | [diff] [blame] | 607 | if (!local->ops->ampdu_action) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 608 | return -EINVAL; |
| 609 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 610 | if (tid >= STA_TID_NUM) |
| 611 | return -EINVAL; |
| 612 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 613 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 614 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 615 | |
| 616 | if (!tid_tx) { |
| 617 | ret = -ENOENT; |
| 618 | goto unlock; |
| 619 | } |
| 620 | |
| 621 | if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 622 | /* already in progress stopping it */ |
| 623 | ret = 0; |
| 624 | goto unlock; |
| 625 | } |
| 626 | |
| 627 | set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); |
| 628 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
| 629 | |
| 630 | unlock: |
| 631 | spin_unlock_bh(&sta->lock); |
| 632 | return ret; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 633 | } |
| 634 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); |
| 635 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 636 | 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] | 637 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 638 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 639 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 640 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 641 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 642 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 643 | trace_api_stop_tx_ba_cb(sdata, ra, tid); |
| 644 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 645 | if (tid >= STA_TID_NUM) { |
| 646 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 647 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
| 648 | tid, STA_TID_NUM); |
| 649 | #endif |
| 650 | return; |
| 651 | } |
| 652 | |
| 653 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 654 | printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n", |
| 655 | ra, tid); |
| 656 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 657 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 658 | mutex_lock(&local->sta_mtx); |
| 659 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 660 | sta = sta_info_get(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 661 | if (!sta) { |
| 662 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 663 | printk(KERN_DEBUG "Could not find station: %pM\n", ra); |
| 664 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 665 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 666 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 667 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 668 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 669 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 670 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 671 | |
| 672 | if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 673 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 674 | printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); |
| 675 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 676 | goto unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 677 | } |
| 678 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 679 | if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR && tid_tx->tx_stop) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 680 | ieee80211_send_delba(sta->sdata, ra, tid, |
| 681 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
| 682 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 683 | /* |
| 684 | * When we get here, the TX path will not be lockless any more wrt. |
| 685 | * aggregation, since the OPERATIONAL bit has long been cleared. |
| 686 | * Thus it will block on getting the lock, if it occurs. So if we |
| 687 | * stop the queue now, we will not get any more packets, and any |
| 688 | * that might be being processed will wait for us here, thereby |
| 689 | * guaranteeing that no packets go to the tid_tx pending queue any |
| 690 | * more. |
| 691 | */ |
| 692 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 693 | ieee80211_agg_splice_packets(local, tid_tx, tid); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 694 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 695 | /* future packets must not find the tid_tx struct any more */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 696 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 697 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 698 | ieee80211_agg_splice_finish(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 699 | |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 700 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 701 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 702 | unlock_sta: |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 703 | spin_unlock_bh(&sta->lock); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 704 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 705 | unlock: |
| 706 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 707 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 708 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 709 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 710 | const u8 *ra, u16 tid) |
| 711 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 712 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 713 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 714 | struct ieee80211_ra_tid *ra_tid; |
| 715 | struct sk_buff *skb = dev_alloc_skb(0); |
| 716 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 717 | if (unlikely(!skb)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 718 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 719 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 720 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 721 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 722 | ra_tid->tid = tid; |
| 723 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 724 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP; |
| 725 | skb_queue_tail(&sdata->skb_queue, skb); |
| 726 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 727 | } |
| 728 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); |
| 729 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 730 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 731 | void ieee80211_process_addba_resp(struct ieee80211_local *local, |
| 732 | struct sta_info *sta, |
| 733 | struct ieee80211_mgmt *mgmt, |
| 734 | size_t len) |
| 735 | { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 736 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 737 | u16 capab, tid; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 738 | u8 buf_size; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 739 | |
| 740 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); |
| 741 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 742 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 743 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 744 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 745 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 746 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 747 | if (!tid_tx) |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 748 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 749 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 750 | if (mgmt->u.action.u.addba_resp.dialog_token != tid_tx->dialog_token) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 751 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 752 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 753 | #endif |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 754 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 755 | } |
| 756 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 757 | del_timer(&tid_tx->addba_resp_timer); |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 758 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 759 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 760 | printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 761 | #endif |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 762 | /* |
| 763 | * IEEE 802.11-2007 7.3.1.14: |
| 764 | * In an ADDBA Response frame, when the Status Code field |
| 765 | * is set to 0, the Buffer Size subfield is set to a value |
| 766 | * of at least 1. |
| 767 | */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 768 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 769 | == WLAN_STATUS_SUCCESS && buf_size) { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 770 | if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED, |
| 771 | &tid_tx->state)) { |
| 772 | /* ignore duplicate response */ |
| 773 | goto out; |
| 774 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 775 | |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 776 | tid_tx->buf_size = buf_size; |
| 777 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 778 | if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 779 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 780 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 781 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 782 | } else { |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 783 | ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR, |
| 784 | true); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 785 | } |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 786 | |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 787 | out: |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 788 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 789 | } |