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 | a93e364 | 2010-06-10 10:21:46 +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 | |
Johannes Berg | 73a72a8 | 2010-06-10 10:21:50 +0200 | [diff] [blame] | 16 | /** |
| 17 | * DOC: RX A-MPDU aggregation |
| 18 | * |
| 19 | * Aggregation on the RX side requires only implementing the |
| 20 | * @ampdu_action callback that is invoked to start/stop any |
| 21 | * block-ack sessions for RX aggregation. |
| 22 | * |
| 23 | * When RX aggregation is started by the peer, the driver is |
| 24 | * notified via @ampdu_action function, with the |
| 25 | * %IEEE80211_AMPDU_RX_START action, and may reject the request |
| 26 | * in which case a negative response is sent to the peer, if it |
| 27 | * accepts it a positive response is sent. |
| 28 | * |
| 29 | * While the session is active, the device/driver are required |
| 30 | * to de-aggregate frames and pass them up one by one to mac80211, |
| 31 | * which will handle the reorder buffer. |
| 32 | * |
| 33 | * When the aggregation session is stopped again by the peer or |
| 34 | * ourselves, the driver's @ampdu_action function will be called |
| 35 | * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the |
| 36 | * call must not fail. |
| 37 | */ |
| 38 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 39 | #include <linux/ieee80211.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 41 | #include <linux/export.h> |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 42 | #include <net/mac80211.h> |
| 43 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 44 | #include "driver-ops.h" |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 45 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 46 | static void ieee80211_free_tid_rx(struct rcu_head *h) |
| 47 | { |
| 48 | struct tid_ampdu_rx *tid_rx = |
| 49 | container_of(h, struct tid_ampdu_rx, rcu_head); |
| 50 | int i; |
| 51 | |
| 52 | for (i = 0; i < tid_rx->buf_size; i++) |
| 53 | dev_kfree_skb(tid_rx->reorder_buf[i]); |
| 54 | kfree(tid_rx->reorder_buf); |
| 55 | kfree(tid_rx->reorder_time); |
| 56 | kfree(tid_rx); |
| 57 | } |
| 58 | |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 59 | void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 60 | u16 initiator, u16 reason, bool tx) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 61 | { |
Johannes Berg | d75636e | 2009-02-10 21:25:53 +0100 | [diff] [blame] | 62 | struct ieee80211_local *local = sta->local; |
Johannes Berg | 098a607 | 2010-04-06 11:18:47 +0200 | [diff] [blame] | 63 | struct tid_ampdu_rx *tid_rx; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 64 | |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 65 | lockdep_assert_held(&sta->ampdu_mlme.mtx); |
Johannes Berg | 098a607 | 2010-04-06 11:18:47 +0200 | [diff] [blame] | 66 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 67 | tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid], |
| 68 | lockdep_is_held(&sta->ampdu_mlme.mtx)); |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 69 | |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 70 | if (!tid_rx) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 71 | return; |
Johannes Berg | d75636e | 2009-02-10 21:25:53 +0100 | [diff] [blame] | 72 | |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 73 | RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 74 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 75 | #ifdef CONFIG_MAC80211_HT_DEBUG |
Nikolay Martynov | 5ccc32f | 2011-11-22 21:50:30 -0500 | [diff] [blame] | 76 | printk(KERN_DEBUG |
| 77 | "Rx BA session stop requested for %pM tid %u %s reason: %d\n", |
| 78 | sta->sta.addr, tid, |
| 79 | initiator == WLAN_BACK_RECIPIENT ? "recipient" : "inititator", |
| 80 | (int)reason); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 81 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 82 | |
Johannes Berg | 12375ef | 2009-11-25 20:30:31 +0100 | [diff] [blame] | 83 | if (drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_STOP, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 84 | &sta->sta, tid, NULL, 0)) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 85 | printk(KERN_DEBUG "HW problem - can not stop rx " |
| 86 | "aggregation for tid %d\n", tid); |
| 87 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 88 | /* check if this is a self generated aggregation halt */ |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 89 | if (initiator == WLAN_BACK_RECIPIENT && tx) |
Johannes Berg | d75636e | 2009-02-10 21:25:53 +0100 | [diff] [blame] | 90 | ieee80211_send_delba(sta->sdata, sta->sta.addr, |
Nikolay Martynov | a7f39f6 | 2011-11-22 21:50:29 -0500 | [diff] [blame] | 91 | tid, WLAN_BACK_RECIPIENT, reason); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 92 | |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 93 | del_timer_sync(&tid_rx->session_timer); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 94 | del_timer_sync(&tid_rx->reorder_timer); |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 95 | |
| 96 | call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 97 | } |
| 98 | |
Johannes Berg | 2aab4c2 | 2010-04-19 11:00:24 +0200 | [diff] [blame] | 99 | void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 100 | u16 initiator, u16 reason, bool tx) |
Johannes Berg | 2aab4c2 | 2010-04-19 11:00:24 +0200 | [diff] [blame] | 101 | { |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 102 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 53f73c0 | 2010-10-05 19:37:40 +0200 | [diff] [blame] | 103 | ___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx); |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 104 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | 2aab4c2 | 2010-04-19 11:00:24 +0200 | [diff] [blame] | 105 | } |
| 106 | |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 107 | void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, |
| 108 | const u8 *addr) |
| 109 | { |
| 110 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
Eliad Peller | 0a557ed | 2011-07-19 13:14:42 +0300 | [diff] [blame] | 111 | struct sta_info *sta; |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 112 | int i; |
| 113 | |
Eliad Peller | 0a557ed | 2011-07-19 13:14:42 +0300 | [diff] [blame] | 114 | rcu_read_lock(); |
Felix Fietkau | bc192f8 | 2011-11-23 21:09:49 +0700 | [diff] [blame] | 115 | sta = sta_info_get_bss(sdata, addr); |
Eliad Peller | 0a557ed | 2011-07-19 13:14:42 +0300 | [diff] [blame] | 116 | if (!sta) { |
| 117 | rcu_read_unlock(); |
| 118 | return; |
| 119 | } |
| 120 | |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 121 | for (i = 0; i < STA_TID_NUM; i++) |
| 122 | if (ba_rx_bitmap & BIT(i)) |
| 123 | set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested); |
| 124 | |
| 125 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); |
Eliad Peller | 0a557ed | 2011-07-19 13:14:42 +0300 | [diff] [blame] | 126 | rcu_read_unlock(); |
Shahar Levi | f41ccd7 | 2011-05-22 16:10:21 +0300 | [diff] [blame] | 127 | } |
| 128 | EXPORT_SYMBOL(ieee80211_stop_rx_ba_session); |
| 129 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 130 | /* |
| 131 | * After accepting the AddBA Request we activated a timer, |
| 132 | * resetting it after each frame that arrives from the originator. |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 133 | */ |
| 134 | static void sta_rx_agg_session_timer_expired(unsigned long data) |
| 135 | { |
| 136 | /* not an elegant detour, but there is no choice as the timer passes |
| 137 | * only one argument, and various sta_info are needed here, so init |
| 138 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
| 139 | * array gives the sta through container_of */ |
| 140 | u8 *ptid = (u8 *)data; |
| 141 | u8 *timer_to_id = ptid - *ptid; |
| 142 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, |
| 143 | timer_to_tid[0]); |
| 144 | |
| 145 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 146 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
| 147 | #endif |
Johannes Berg | 7c3b1dd | 2010-06-10 10:21:44 +0200 | [diff] [blame] | 148 | set_bit(*ptid, sta->ampdu_mlme.tid_rx_timer_expired); |
| 149 | ieee80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 150 | } |
| 151 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 152 | static void sta_rx_agg_reorder_timer_expired(unsigned long data) |
| 153 | { |
| 154 | u8 *ptid = (u8 *)data; |
| 155 | u8 *timer_to_id = ptid - *ptid; |
| 156 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, |
| 157 | timer_to_tid[0]); |
| 158 | |
| 159 | rcu_read_lock(); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 160 | ieee80211_release_reorder_timeout(sta, *ptid); |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 161 | rcu_read_unlock(); |
| 162 | } |
| 163 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 164 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
| 165 | u8 dialog_token, u16 status, u16 policy, |
| 166 | u16 buf_size, u16 timeout) |
| 167 | { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 168 | struct ieee80211_local *local = sdata->local; |
| 169 | struct sk_buff *skb; |
| 170 | struct ieee80211_mgmt *mgmt; |
| 171 | u16 capab; |
| 172 | |
| 173 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 174 | if (!skb) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 175 | return; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 176 | |
| 177 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 178 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
| 179 | memset(mgmt, 0, 24); |
| 180 | memcpy(mgmt->da, da, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 181 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 8abd3f9 | 2009-02-10 21:25:47 +0100 | [diff] [blame] | 182 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
Thomas Pedersen | ae2772b | 2011-10-26 14:47:29 -0700 | [diff] [blame] | 183 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
| 184 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 185 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 186 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
| 187 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 188 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
| 189 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 190 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 191 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 192 | IEEE80211_STYPE_ACTION); |
| 193 | |
| 194 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); |
| 195 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
| 196 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; |
| 197 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; |
| 198 | |
| 199 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ |
| 200 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ |
| 201 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ |
| 202 | |
| 203 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); |
| 204 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); |
| 205 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); |
| 206 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 207 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | void ieee80211_process_addba_request(struct ieee80211_local *local, |
| 211 | struct sta_info *sta, |
| 212 | struct ieee80211_mgmt *mgmt, |
| 213 | size_t len) |
| 214 | { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 215 | struct tid_ampdu_rx *tid_agg_rx; |
| 216 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; |
| 217 | u8 dialog_token; |
| 218 | int ret = -EOPNOTSUPP; |
| 219 | |
| 220 | /* extract session parameters from addba request frame */ |
| 221 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; |
| 222 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); |
| 223 | start_seq_num = |
| 224 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; |
| 225 | |
| 226 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); |
| 227 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; |
| 228 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; |
| 229 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; |
| 230 | |
| 231 | status = WLAN_STATUS_REQUEST_DECLINED; |
| 232 | |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 233 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { |
Sujith | 722f069 | 2009-03-17 08:50:06 +0530 | [diff] [blame] | 234 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 235 | printk(KERN_DEBUG "Suspend in progress. " |
| 236 | "Denying ADDBA request\n"); |
| 237 | #endif |
| 238 | goto end_no_lock; |
| 239 | } |
| 240 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 241 | /* sanity check for incoming parameters: |
| 242 | * check if configuration can support the BA policy |
| 243 | * and if buffer size does not exceeds max value */ |
| 244 | /* XXX: check own ht delayed BA capability?? */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 245 | if (((ba_policy != 1) && |
| 246 | (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) || |
| 247 | (buf_size > IEEE80211_MAX_AMPDU_BUF)) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 248 | status = WLAN_STATUS_INVALID_QOS_PARAM; |
| 249 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 250 | if (net_ratelimit()) |
| 251 | printk(KERN_DEBUG "AddBA Req with bad params from " |
| 252 | "%pM on tid %u. policy %d, buffer size %d\n", |
| 253 | mgmt->sa, tid, ba_policy, |
| 254 | buf_size); |
| 255 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 256 | goto end_no_lock; |
| 257 | } |
| 258 | /* determine default buffer size */ |
Luciano Coelho | 82694f7 | 2011-01-12 15:18:11 +0200 | [diff] [blame] | 259 | if (buf_size == 0) |
| 260 | buf_size = IEEE80211_MAX_AMPDU_BUF; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 261 | |
Luciano Coelho | df6ba5d | 2011-01-12 15:26:30 +0200 | [diff] [blame] | 262 | /* make sure the size doesn't exceed the maximum supported by the hw */ |
| 263 | if (buf_size > local->hw.max_rx_aggregation_subframes) |
| 264 | buf_size = local->hw.max_rx_aggregation_subframes; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 265 | |
| 266 | /* examine state machine */ |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 267 | mutex_lock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 268 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 269 | if (sta->ampdu_mlme.tid_rx[tid]) { |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 270 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 271 | if (net_ratelimit()) |
| 272 | printk(KERN_DEBUG "unexpected AddBA Req from " |
| 273 | "%pM on tid %u\n", |
| 274 | mgmt->sa, tid); |
| 275 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
Arik Nemtsov | 15b4d84 | 2011-06-23 01:15:27 +0300 | [diff] [blame] | 276 | |
| 277 | /* delete existing Rx BA session on the same tid */ |
| 278 | ___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, |
| 279 | WLAN_STATUS_UNSPECIFIED_QOS, |
| 280 | false); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | /* prepare A-MPDU MLME for Rx aggregation */ |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 284 | tid_agg_rx = kmalloc(sizeof(struct tid_ampdu_rx), GFP_KERNEL); |
Joe Perches | d15b845 | 2011-08-29 14:17:31 -0700 | [diff] [blame] | 285 | if (!tid_agg_rx) |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 286 | goto end; |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 287 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 288 | spin_lock_init(&tid_agg_rx->reorder_lock); |
| 289 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 290 | /* rx timer */ |
| 291 | tid_agg_rx->session_timer.function = sta_rx_agg_session_timer_expired; |
| 292 | tid_agg_rx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
| 293 | init_timer(&tid_agg_rx->session_timer); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 294 | |
Christian Lamparter | 2bff8eb | 2010-08-05 01:36:41 +0200 | [diff] [blame] | 295 | /* rx reorder timer */ |
| 296 | tid_agg_rx->reorder_timer.function = sta_rx_agg_reorder_timer_expired; |
| 297 | tid_agg_rx->reorder_timer.data = (unsigned long)&sta->timer_to_tid[tid]; |
| 298 | init_timer(&tid_agg_rx->reorder_timer); |
| 299 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 300 | /* prepare reordering buffer */ |
| 301 | tid_agg_rx->reorder_buf = |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 302 | kcalloc(buf_size, sizeof(struct sk_buff *), GFP_KERNEL); |
Jouni Malinen | 4d050f1 | 2009-05-05 20:35:14 +0300 | [diff] [blame] | 303 | tid_agg_rx->reorder_time = |
Johannes Berg | dd31857 | 2010-11-29 11:09:16 +0100 | [diff] [blame] | 304 | kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL); |
Jouni Malinen | 4d050f1 | 2009-05-05 20:35:14 +0300 | [diff] [blame] | 305 | if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) { |
Jouni Malinen | 4d050f1 | 2009-05-05 20:35:14 +0300 | [diff] [blame] | 306 | kfree(tid_agg_rx->reorder_buf); |
| 307 | kfree(tid_agg_rx->reorder_time); |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 308 | kfree(tid_agg_rx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 309 | goto end; |
| 310 | } |
| 311 | |
Johannes Berg | 12375ef | 2009-11-25 20:30:31 +0100 | [diff] [blame] | 312 | ret = drv_ampdu_action(local, sta->sdata, IEEE80211_AMPDU_RX_START, |
Johannes Berg | 0b01f03 | 2011-01-18 13:51:05 +0100 | [diff] [blame] | 313 | &sta->sta, tid, &start_seq_num, 0); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 314 | #ifdef CONFIG_MAC80211_HT_DEBUG |
| 315 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
| 316 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
| 317 | |
| 318 | if (ret) { |
| 319 | kfree(tid_agg_rx->reorder_buf); |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 320 | kfree(tid_agg_rx->reorder_time); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 321 | kfree(tid_agg_rx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 322 | goto end; |
| 323 | } |
| 324 | |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 325 | /* update data */ |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 326 | tid_agg_rx->dialog_token = dialog_token; |
| 327 | tid_agg_rx->ssn = start_seq_num; |
| 328 | tid_agg_rx->head_seq_num = start_seq_num; |
| 329 | tid_agg_rx->buf_size = buf_size; |
| 330 | tid_agg_rx->timeout = timeout; |
| 331 | tid_agg_rx->stored_mpdu_num = 0; |
| 332 | status = WLAN_STATUS_SUCCESS; |
Johannes Berg | a87f736 | 2010-06-10 10:21:38 +0200 | [diff] [blame] | 333 | |
| 334 | /* activate it for RX */ |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame^] | 335 | rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx); |
Johannes Berg | f955ebb | 2010-06-10 10:21:45 +0200 | [diff] [blame] | 336 | |
| 337 | if (timeout) |
| 338 | mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout)); |
| 339 | |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 340 | end: |
Johannes Berg | a93e364 | 2010-06-10 10:21:46 +0200 | [diff] [blame] | 341 | mutex_unlock(&sta->ampdu_mlme.mtx); |
Johannes Berg | b8695a8 | 2009-02-10 21:25:46 +0100 | [diff] [blame] | 342 | |
| 343 | end_no_lock: |
| 344 | ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid, |
| 345 | dialog_token, status, 1, buf_size, timeout); |
| 346 | } |