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 | |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 107 | 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] | 108 | { |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 109 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 110 | struct ieee80211_local *local = sdata->local; |
| 111 | struct sk_buff *skb; |
| 112 | struct ieee80211_bar *bar; |
| 113 | u16 bar_control = 0; |
| 114 | |
| 115 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 116 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 117 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 118 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 119 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 120 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); |
| 121 | memset(bar, 0, sizeof(*bar)); |
| 122 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
| 123 | IEEE80211_STYPE_BACK_REQ); |
| 124 | memcpy(bar->ra, ra, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 125 | memcpy(bar->ta, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 126 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
| 127 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; |
Helmut Schaa | c1407b6 | 2011-08-11 16:17:41 +0200 | [diff] [blame] | 128 | bar_control |= (u16)(tid << IEEE80211_BAR_CTRL_TID_INFO_SHIFT); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 129 | bar->control = cpu_to_le16(bar_control); |
| 130 | bar->start_seq_num = cpu_to_le16(ssn); |
| 131 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 132 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 133 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 134 | } |
Felix Fietkau | 8c77124 | 2011-08-20 15:53:55 +0200 | [diff] [blame] | 135 | EXPORT_SYMBOL(ieee80211_send_bar); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 136 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 137 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
| 138 | struct tid_ampdu_tx *tid_tx) |
| 139 | { |
| 140 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
| 141 | lockdep_assert_held(&sta->lock); |
| 142 | rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx); |
| 143 | } |
| 144 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 145 | int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 146 | enum ieee80211_back_parties initiator, |
| 147 | bool tx) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 148 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 149 | struct ieee80211_local *local = sta->local; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 150 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 151 | int ret; |
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 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 154 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 155 | spin_lock_bh(&sta->lock); |
| 156 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 157 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 158 | if (!tid_tx) { |
| 159 | spin_unlock_bh(&sta->lock); |
| 160 | return -ENOENT; |
| 161 | } |
| 162 | |
Johannes Berg | 24f50a9 | 2011-11-24 20:06:14 +0100 | [diff] [blame] | 163 | /* if we're already stopping ignore any new requests to stop */ |
| 164 | if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 165 | spin_unlock_bh(&sta->lock); |
| 166 | return -EALREADY; |
| 167 | } |
| 168 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 169 | if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
| 170 | /* not even started yet! */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 171 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 172 | spin_unlock_bh(&sta->lock); |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 173 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 174 | return 0; |
| 175 | } |
| 176 | |
Johannes Berg | 24f50a9 | 2011-11-24 20:06:14 +0100 | [diff] [blame] | 177 | set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state); |
| 178 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 179 | spin_unlock_bh(&sta->lock); |
| 180 | |
Johannes Berg | 827d42c | 2009-11-22 12:28:41 +0100 | [diff] [blame] | 181 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 182 | printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n", |
| 183 | sta->sta.addr, tid); |
| 184 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 185 | |
Johannes Berg | 44271488 | 2010-10-05 21:40:33 +0200 | [diff] [blame] | 186 | del_timer_sync(&tid_tx->addba_resp_timer); |
| 187 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 188 | /* |
| 189 | * After this packets are no longer handed right through |
| 190 | * to the driver but are put onto tid_tx->pending instead, |
| 191 | * with locking to ensure proper access. |
| 192 | */ |
| 193 | clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Vasanthakumar Thiagarajan | 736708b | 2009-06-09 14:11:46 +0530 | [diff] [blame] | 194 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 195 | tid_tx->stop_initiator = initiator; |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 196 | tid_tx->tx_stop = tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 197 | |
Johannes Berg | 12375ef | 2009-11-25 20:30:31 +0100 | [diff] [blame] | 198 | ret = drv_ampdu_action(local, sta->sdata, |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 199 | IEEE80211_AMPDU_TX_STOP, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 200 | &sta->sta, tid, NULL, 0); |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 201 | |
| 202 | /* HW shall not deny going back to legacy */ |
| 203 | if (WARN_ON(ret)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 204 | /* |
| 205 | * We may have pending packets get stuck in this case... |
| 206 | * Not bothering with a workaround for now. |
| 207 | */ |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | return ret; |
| 211 | } |
| 212 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 213 | /* |
| 214 | * After sending add Block Ack request we activated a timer until |
| 215 | * add Block Ack response will arrive from the recipient. |
| 216 | * If this timer expires sta_addba_resp_timer_expired will be executed. |
| 217 | */ |
| 218 | static void sta_addba_resp_timer_expired(unsigned long data) |
| 219 | { |
| 220 | /* not an elegant detour, but there is no choice as the timer passes |
| 221 | * only one argument, and both sta_info and TID are needed, so init |
| 222 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
| 223 | * array gives the sta through container_of */ |
| 224 | u16 tid = *(u8 *)data; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 225 | struct sta_info *sta = container_of((void *)data, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 226 | struct sta_info, timer_to_tid[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 227 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 228 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 229 | /* check if the TID waits for addBA response */ |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 230 | rcu_read_lock(); |
| 231 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 232 | if (!tid_tx || |
| 233 | test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 234 | rcu_read_unlock(); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 235 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 236 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
Johannes Berg | 67e0f39 | 2010-04-19 11:03:13 +0200 | [diff] [blame] | 237 | "(or no longer) expecting addBA response there\n", |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 238 | tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 239 | #endif |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 240 | return; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 244 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
| 245 | #endif |
| 246 | |
Johannes Berg | 83a5cbf | 2010-06-10 10:21:47 +0200 | [diff] [blame] | 247 | ieee80211_stop_tx_ba_session(&sta->sta, tid); |
| 248 | rcu_read_unlock(); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 249 | } |
| 250 | |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 251 | static inline int ieee80211_ac_from_tid(int tid) |
| 252 | { |
| 253 | return ieee802_1d_to_ac[tid & 7]; |
| 254 | } |
| 255 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 256 | /* |
| 257 | * When multiple aggregation sessions on multiple stations |
| 258 | * are being created/destroyed simultaneously, we need to |
| 259 | * refcount the global queue stop caused by that in order |
| 260 | * to not get into a situation where one of the aggregation |
| 261 | * setup or teardown re-enables queues before the other is |
| 262 | * ready to handle that. |
| 263 | * |
| 264 | * These two functions take care of this issue by keeping |
| 265 | * a global "agg_queue_stop" refcount. |
| 266 | */ |
| 267 | static void __acquires(agg_queue) |
| 268 | ieee80211_stop_queue_agg(struct ieee80211_local *local, int tid) |
| 269 | { |
| 270 | int queue = ieee80211_ac_from_tid(tid); |
| 271 | |
| 272 | if (atomic_inc_return(&local->agg_queue_stop[queue]) == 1) |
| 273 | ieee80211_stop_queue_by_reason( |
| 274 | &local->hw, queue, |
| 275 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION); |
| 276 | __acquire(agg_queue); |
| 277 | } |
| 278 | |
| 279 | static void __releases(agg_queue) |
| 280 | ieee80211_wake_queue_agg(struct ieee80211_local *local, int tid) |
| 281 | { |
| 282 | int queue = ieee80211_ac_from_tid(tid); |
| 283 | |
| 284 | if (atomic_dec_return(&local->agg_queue_stop[queue]) == 0) |
| 285 | ieee80211_wake_queue_by_reason( |
| 286 | &local->hw, queue, |
| 287 | IEEE80211_QUEUE_STOP_REASON_AGGREGATION); |
| 288 | __release(agg_queue); |
| 289 | } |
| 290 | |
Johannes Berg | 67c282c | 2010-06-10 10:21:43 +0200 | [diff] [blame] | 291 | 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] | 292 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 293 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 294 | struct ieee80211_local *local = sta->local; |
| 295 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 296 | u16 start_seq_num; |
| 297 | int ret; |
| 298 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 299 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 300 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 301 | /* |
| 302 | * While we're asking the driver about the aggregation, |
| 303 | * stop the AC queue so that we don't have to worry |
| 304 | * about frames that came in while we were doing that, |
| 305 | * which would require us to put them to the AC pending |
| 306 | * afterwards which just makes the code more complex. |
| 307 | */ |
| 308 | ieee80211_stop_queue_agg(local, tid); |
| 309 | |
| 310 | clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
| 311 | |
| 312 | /* |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 313 | * make sure no packets are being processed to get |
| 314 | * valid starting sequence number |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 315 | */ |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 316 | synchronize_net(); |
| 317 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 318 | start_seq_num = sta->tid_seq[tid] >> 4; |
| 319 | |
| 320 | ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 321 | &sta->sta, tid, &start_seq_num, 0); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 322 | if (ret) { |
| 323 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 324 | printk(KERN_DEBUG "BA request denied - HW unavailable for" |
| 325 | " tid %d\n", tid); |
| 326 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 327 | spin_lock_bh(&sta->lock); |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 328 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 329 | spin_unlock_bh(&sta->lock); |
| 330 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 331 | ieee80211_wake_queue_agg(local, tid); |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 332 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 333 | return; |
| 334 | } |
| 335 | |
| 336 | /* we can take packets again now */ |
| 337 | ieee80211_wake_queue_agg(local, tid); |
| 338 | |
| 339 | /* activate the timer for the recipient's addBA response */ |
| 340 | mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL); |
| 341 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 342 | printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid); |
| 343 | #endif |
| 344 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 345 | spin_lock_bh(&sta->lock); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 346 | sta->ampdu_mlme.addba_req_num[tid]++; |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 347 | spin_unlock_bh(&sta->lock); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 348 | |
| 349 | /* send AddBA request */ |
| 350 | ieee80211_send_addba_request(sdata, sta->sta.addr, tid, |
| 351 | tid_tx->dialog_token, start_seq_num, |
Johannes Berg | 5dd36bc | 2011-01-18 13:52:23 +0100 | [diff] [blame] | 352 | local->hw.max_tx_aggregation_subframes, |
| 353 | tid_tx->timeout); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 354 | } |
| 355 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 356 | int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, |
| 357 | u16 timeout) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 358 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 359 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 360 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 361 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 362 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | e4e72fb | 2009-03-23 17:28:42 +0100 | [diff] [blame] | 363 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 364 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 365 | trace_api_start_tx_ba_session(pubsta, tid); |
| 366 | |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 367 | if (WARN_ON(!local->ops->ampdu_action)) |
| 368 | return -EINVAL; |
| 369 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 370 | if ((tid >= STA_TID_NUM) || |
Arik Nemtsov | edf6b78 | 2011-08-30 09:32:38 +0300 | [diff] [blame] | 371 | !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) || |
| 372 | (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 373 | return -EINVAL; |
| 374 | |
| 375 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 376 | printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n", |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 377 | pubsta->addr, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 378 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 379 | |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 380 | /* |
| 381 | * The aggregation code is not prepared to handle |
| 382 | * anything but STA/AP due to the BSSID handling. |
| 383 | * IBSS could work in the code but isn't supported |
| 384 | * by drivers or the standard. |
| 385 | */ |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 386 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
| 387 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
| 388 | sdata->vif.type != NL80211_IFTYPE_AP) |
| 389 | return -EINVAL; |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 390 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 391 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 392 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Johannes Berg | 2a41905 | 2010-06-10 10:21:29 +0200 | [diff] [blame] | 393 | printk(KERN_DEBUG "BA sessions blocked. " |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 394 | "Denying BA session request\n"); |
| 395 | #endif |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 396 | return -EINVAL; |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 397 | } |
| 398 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 399 | spin_lock_bh(&sta->lock); |
| 400 | |
| 401 | /* we have tried too many times, receiver does not want A-MPDU */ |
| 402 | if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { |
| 403 | ret = -EBUSY; |
| 404 | goto err_unlock_sta; |
| 405 | } |
| 406 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 407 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 408 | /* check if the TID is not in aggregation flow already */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 409 | if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 410 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 411 | printk(KERN_DEBUG "BA request denied - session is not " |
| 412 | "idle on tid %u\n", tid); |
| 413 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 414 | ret = -EAGAIN; |
| 415 | goto err_unlock_sta; |
| 416 | } |
| 417 | |
| 418 | /* prepare A-MPDU MLME for Tx aggregation */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 419 | tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); |
| 420 | if (!tid_tx) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 421 | ret = -ENOMEM; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 422 | goto err_unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 423 | } |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 424 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 425 | skb_queue_head_init(&tid_tx->pending); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 426 | __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 427 | |
Sujith Manoharan | bd2ce6e | 2010-12-15 07:47:10 +0530 | [diff] [blame] | 428 | tid_tx->timeout = timeout; |
| 429 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 430 | /* Tx timer */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 431 | tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired; |
| 432 | tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
| 433 | init_timer(&tid_tx->addba_resp_timer); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 434 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 435 | /* assign a dialog token */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 436 | sta->ampdu_mlme.dialog_token_allocator++; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 437 | tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 438 | |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 439 | /* |
| 440 | * Finally, assign it to the start array; the work item will |
| 441 | * collect it and move it to the normal array. |
| 442 | */ |
| 443 | sta->ampdu_mlme.tid_start_tx[tid] = tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 444 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 445 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
Johannes Berg | 51a0d38 | 2010-05-31 12:00:12 +0200 | [diff] [blame] | 446 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 447 | /* this flow continues off the work */ |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 448 | err_unlock_sta: |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 449 | spin_unlock_bh(&sta->lock); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 450 | return ret; |
| 451 | } |
| 452 | EXPORT_SYMBOL(ieee80211_start_tx_ba_session); |
| 453 | |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 454 | /* |
| 455 | * splice packets from the STA's pending to the local pending, |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 456 | * requires a call to ieee80211_agg_splice_finish later |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 457 | */ |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 458 | static void __acquires(agg_queue) |
| 459 | ieee80211_agg_splice_packets(struct ieee80211_local *local, |
| 460 | struct tid_ampdu_tx *tid_tx, u16 tid) |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 461 | { |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 462 | int queue = ieee80211_ac_from_tid(tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 463 | unsigned long flags; |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 464 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 465 | ieee80211_stop_queue_agg(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 466 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 467 | if (WARN(!tid_tx, "TID %d gone but expected when splicing aggregates" |
| 468 | " from the pending queue\n", tid)) |
Luis R. Rodriguez | 416fbdf | 2009-08-11 13:10:33 -0700 | [diff] [blame] | 469 | return; |
| 470 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 471 | if (!skb_queue_empty(&tid_tx->pending)) { |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 472 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 473 | /* copy over remaining packets */ |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 474 | skb_queue_splice_tail_init(&tid_tx->pending, |
| 475 | &local->pending[queue]); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 476 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
| 477 | } |
| 478 | } |
| 479 | |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 480 | static void __releases(agg_queue) |
| 481 | ieee80211_agg_splice_finish(struct ieee80211_local *local, u16 tid) |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 482 | { |
Johannes Berg | a6a67db | 2010-06-10 10:21:41 +0200 | [diff] [blame] | 483 | ieee80211_wake_queue_agg(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 484 | } |
| 485 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 486 | static void ieee80211_agg_tx_operational(struct ieee80211_local *local, |
| 487 | struct sta_info *sta, u16 tid) |
| 488 | { |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 489 | struct tid_ampdu_tx *tid_tx; |
| 490 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 491 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 492 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 493 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
| 494 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 495 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 496 | printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 497 | #endif |
| 498 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 499 | drv_ampdu_action(local, sta->sdata, |
| 500 | IEEE80211_AMPDU_TX_OPERATIONAL, |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 501 | &sta->sta, tid, NULL, tid_tx->buf_size); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 502 | |
| 503 | /* |
| 504 | * synchronize with TX path, while splicing the TX path |
| 505 | * should block so it won't put more packets onto pending. |
| 506 | */ |
| 507 | spin_lock_bh(&sta->lock); |
| 508 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 509 | ieee80211_agg_splice_packets(local, tid_tx, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 510 | /* |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 511 | * Now mark as operational. This will be visible |
| 512 | * in the TX path, and lets it go lock-free in |
| 513 | * the common case. |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 514 | */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 515 | set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 516 | ieee80211_agg_splice_finish(local, tid); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 517 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 518 | spin_unlock_bh(&sta->lock); |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 519 | } |
| 520 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 521 | 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] | 522 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 523 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 524 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 525 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 526 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 527 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 528 | trace_api_start_tx_ba_cb(sdata, ra, tid); |
| 529 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 530 | if (tid >= STA_TID_NUM) { |
| 531 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 532 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
| 533 | tid, STA_TID_NUM); |
| 534 | #endif |
| 535 | return; |
| 536 | } |
| 537 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 538 | mutex_lock(&local->sta_mtx); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 539 | sta = sta_info_get(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 540 | if (!sta) { |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 541 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 542 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 543 | printk(KERN_DEBUG "Could not find station: %pM\n", ra); |
| 544 | #endif |
| 545 | return; |
| 546 | } |
| 547 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 548 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 549 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 550 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 551 | if (WARN_ON(!tid_tx)) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 552 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 553 | printk(KERN_DEBUG "addBA was not requested!\n"); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 554 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 555 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 556 | } |
| 557 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 558 | 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] | 559 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 560 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 561 | if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 562 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 563 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 564 | unlock: |
| 565 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 566 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 567 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 568 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 569 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 570 | const u8 *ra, u16 tid) |
| 571 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 572 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 573 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 574 | struct ieee80211_ra_tid *ra_tid; |
| 575 | struct sk_buff *skb = dev_alloc_skb(0); |
| 576 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 577 | if (unlikely(!skb)) |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 578 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 579 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 580 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 581 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 582 | ra_tid->tid = tid; |
| 583 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 584 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START; |
| 585 | skb_queue_tail(&sdata->skb_queue, skb); |
| 586 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 587 | } |
| 588 | EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); |
| 589 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 590 | int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 591 | enum ieee80211_back_parties initiator, |
| 592 | bool tx) |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 593 | { |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 594 | int ret; |
| 595 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 596 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 597 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 598 | ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator, tx); |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 599 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 600 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 601 | |
Johannes Berg | 849b796 | 2009-02-10 21:25:54 +0100 | [diff] [blame] | 602 | return ret; |
| 603 | } |
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 | int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 606 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 607 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); |
| 608 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 609 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 610 | struct tid_ampdu_tx *tid_tx; |
| 611 | int ret = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 612 | |
Johannes Berg | 6a8579d | 2010-05-27 14:41:07 +0200 | [diff] [blame] | 613 | trace_api_stop_tx_ba_session(pubsta, tid); |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 614 | |
Johannes Berg | 4253119 | 2009-11-20 09:15:51 +0100 | [diff] [blame] | 615 | if (!local->ops->ampdu_action) |
Johannes Berg | 23e6a7e | 2009-02-10 21:25:50 +0100 | [diff] [blame] | 616 | return -EINVAL; |
| 617 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 618 | if (tid >= STA_TID_NUM) |
| 619 | return -EINVAL; |
| 620 | |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 621 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 622 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | 0ab3370 | 2010-06-10 10:21:42 +0200 | [diff] [blame] | 623 | |
| 624 | if (!tid_tx) { |
| 625 | ret = -ENOENT; |
| 626 | goto unlock; |
| 627 | } |
| 628 | |
| 629 | if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
| 630 | /* already in progress stopping it */ |
| 631 | ret = 0; |
| 632 | goto unlock; |
| 633 | } |
| 634 | |
| 635 | set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); |
| 636 | ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); |
| 637 | |
| 638 | unlock: |
| 639 | spin_unlock_bh(&sta->lock); |
| 640 | return ret; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 641 | } |
| 642 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); |
| 643 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 644 | 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] | 645 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 646 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 647 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 648 | struct sta_info *sta; |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 649 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 650 | |
Johannes Berg | b5878a2 | 2010-04-07 16:48:40 +0200 | [diff] [blame] | 651 | trace_api_stop_tx_ba_cb(sdata, ra, tid); |
| 652 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 653 | if (tid >= STA_TID_NUM) { |
| 654 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 655 | printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n", |
| 656 | tid, STA_TID_NUM); |
| 657 | #endif |
| 658 | return; |
| 659 | } |
| 660 | |
| 661 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 662 | printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n", |
| 663 | ra, tid); |
| 664 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 665 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 666 | mutex_lock(&local->sta_mtx); |
| 667 | |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 668 | sta = sta_info_get(sdata, ra); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 669 | if (!sta) { |
| 670 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 671 | printk(KERN_DEBUG "Could not find station: %pM\n", ra); |
| 672 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 673 | goto unlock; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 674 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 675 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 676 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 677 | spin_lock_bh(&sta->lock); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 678 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 679 | |
| 680 | if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 681 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 682 | printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n"); |
| 683 | #endif |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 684 | goto unlock_sta; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 685 | } |
| 686 | |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 687 | if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR && tid_tx->tx_stop) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 688 | ieee80211_send_delba(sta->sdata, ra, tid, |
| 689 | WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); |
| 690 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 691 | /* |
| 692 | * When we get here, the TX path will not be lockless any more wrt. |
| 693 | * aggregation, since the OPERATIONAL bit has long been cleared. |
| 694 | * Thus it will block on getting the lock, if it occurs. So if we |
| 695 | * stop the queue now, we will not get any more packets, and any |
| 696 | * that might be being processed will wait for us here, thereby |
| 697 | * guaranteeing that no packets go to the tid_tx pending queue any |
| 698 | * more. |
| 699 | */ |
| 700 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 701 | ieee80211_agg_splice_packets(local, tid_tx, tid); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 702 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 703 | /* future packets must not find the tid_tx struct any more */ |
Johannes Berg | ec034b2 | 2011-05-13 13:35:40 +0200 | [diff] [blame] | 704 | ieee80211_assign_tid_tx(sta, tid, NULL); |
Johannes Berg | 96f5e66 | 2009-02-12 00:51:53 +0100 | [diff] [blame] | 705 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 706 | ieee80211_agg_splice_finish(local, tid); |
Johannes Berg | cd8ffc8 | 2009-03-23 17:28:41 +0100 | [diff] [blame] | 707 | |
Lai Jiangshan | 0744371 | 2011-03-15 18:02:42 +0800 | [diff] [blame] | 708 | kfree_rcu(tid_tx, rcu_head); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 709 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 710 | unlock_sta: |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 711 | spin_unlock_bh(&sta->lock); |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 712 | mutex_unlock(&sta->ampdu_mlme.mtx); |
| 713 | unlock: |
| 714 | mutex_unlock(&local->sta_mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 715 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 716 | |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 717 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 718 | const u8 *ra, u16 tid) |
| 719 | { |
Johannes Berg | c951ad3 | 2009-11-16 12:00:38 +0100 | [diff] [blame] | 720 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 721 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 722 | struct ieee80211_ra_tid *ra_tid; |
| 723 | struct sk_buff *skb = dev_alloc_skb(0); |
| 724 | |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 725 | if (unlikely(!skb)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 726 | return; |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 727 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 728 | ra_tid = (struct ieee80211_ra_tid *) &skb->cb; |
| 729 | memcpy(&ra_tid->ra, ra, ETH_ALEN); |
| 730 | ra_tid->tid = tid; |
| 731 | |
Johannes Berg | c1475ca | 2010-06-10 10:21:37 +0200 | [diff] [blame] | 732 | skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP; |
| 733 | skb_queue_tail(&sdata->skb_queue, skb); |
| 734 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 735 | } |
| 736 | EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); |
| 737 | |
Johannes Berg | 86ab6c5 | 2009-02-10 21:25:49 +0100 | [diff] [blame] | 738 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 739 | void ieee80211_process_addba_resp(struct ieee80211_local *local, |
| 740 | struct sta_info *sta, |
| 741 | struct ieee80211_mgmt *mgmt, |
| 742 | size_t len) |
| 743 | { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 744 | struct tid_ampdu_tx *tid_tx; |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 745 | u16 capab, tid; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 746 | u8 buf_size; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 747 | |
| 748 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); |
| 749 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 750 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 751 | |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 752 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 753 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 754 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 755 | if (!tid_tx) |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 756 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 757 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 758 | 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] | 759 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 760 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 761 | #endif |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 762 | goto out; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 763 | } |
| 764 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 765 | del_timer(&tid_tx->addba_resp_timer); |
Johannes Berg | 8ade008 | 2009-11-18 17:15:06 +0100 | [diff] [blame] | 766 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 767 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 768 | printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid); |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 769 | #endif |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 770 | /* |
| 771 | * IEEE 802.11-2007 7.3.1.14: |
| 772 | * In an ADDBA Response frame, when the Status Code field |
| 773 | * is set to 0, the Buffer Size subfield is set to a value |
| 774 | * of at least 1. |
| 775 | */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 776 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) |
Helmut Schaa | 3ca9788 | 2011-07-26 12:18:27 +0200 | [diff] [blame] | 777 | == WLAN_STATUS_SUCCESS && buf_size) { |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 778 | if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED, |
| 779 | &tid_tx->state)) { |
| 780 | /* ignore duplicate response */ |
| 781 | goto out; |
| 782 | } |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 783 | |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 784 | tid_tx->buf_size = buf_size; |
| 785 | |
Johannes Berg | a622ab7 | 2010-06-10 10:21:39 +0200 | [diff] [blame] | 786 | if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)) |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 787 | ieee80211_agg_tx_operational(local, sta, tid); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 788 | |
Johannes Berg | b172023 | 2009-03-23 17:28:39 +0100 | [diff] [blame] | 789 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 790 | } else { |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 791 | ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR, |
| 792 | true); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 793 | } |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 794 | |
Johannes Berg | 2171abc | 2009-10-29 08:34:00 +0100 | [diff] [blame] | 795 | out: |
Johannes Berg | cfcdbde | 2010-06-10 10:21:48 +0200 | [diff] [blame] | 796 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 797 | } |