594 lines
16 KiB
C
594 lines
16 KiB
C
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/*
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* HT handling
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*
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* Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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* Copyright 2007-2009, Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ieee80211.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "wme.h"
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static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
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const u8 *da, u16 tid,
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u8 dialog_token, u16 start_seq_num,
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u16 agg_size, u16 timeout)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u16 capab;
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skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
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if (!skb) {
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printk(KERN_ERR "%s: failed to allocate buffer "
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"for addba request frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, da, ETH_ALEN);
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memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
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if (sdata->vif.type == NL80211_IFTYPE_AP)
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memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
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else
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memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_ACTION);
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skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
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mgmt->u.action.category = WLAN_CATEGORY_BACK;
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mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
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mgmt->u.action.u.addba_req.dialog_token = dialog_token;
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capab = (u16)(1 << 1); /* bit 1 aggregation policy */
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capab |= (u16)(tid << 2); /* bit 5:2 TID number */
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capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
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mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
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mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
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mgmt->u.action.u.addba_req.start_seq_num =
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cpu_to_le16(start_seq_num << 4);
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ieee80211_tx_skb(sdata, skb, 1);
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}
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void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
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{
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct ieee80211_bar *bar;
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u16 bar_control = 0;
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skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
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if (!skb) {
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printk(KERN_ERR "%s: failed to allocate buffer for "
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"bar frame\n", sdata->dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
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memset(bar, 0, sizeof(*bar));
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bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
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IEEE80211_STYPE_BACK_REQ);
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memcpy(bar->ra, ra, ETH_ALEN);
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memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
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bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
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bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
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bar_control |= (u16)(tid << 12);
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bar->control = cpu_to_le16(bar_control);
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bar->start_seq_num = cpu_to_le16(ssn);
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ieee80211_tx_skb(sdata, skb, 0);
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}
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/*
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* After sending add Block Ack request we activated a timer until
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* add Block Ack response will arrive from the recipient.
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* If this timer expires sta_addba_resp_timer_expired will be executed.
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*/
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static void sta_addba_resp_timer_expired(unsigned long data)
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{
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/* not an elegant detour, but there is no choice as the timer passes
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* only one argument, and both sta_info and TID are needed, so init
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* flow in sta_info_create gives the TID as data, while the timer_to_id
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* array gives the sta through container_of */
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u16 tid = *(u8 *)data;
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struct sta_info *temp_sta = container_of((void *)data,
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struct sta_info, timer_to_tid[tid]);
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struct ieee80211_local *local = temp_sta->local;
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struct ieee80211_hw *hw = &local->hw;
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struct sta_info *sta;
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u8 *state;
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rcu_read_lock();
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sta = sta_info_get(local, temp_sta->sta.addr);
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if (!sta) {
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rcu_read_unlock();
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return;
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}
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state = &sta->ampdu_mlme.tid_state_tx[tid];
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/* check if the TID waits for addBA response */
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spin_lock_bh(&sta->lock);
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if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
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spin_unlock_bh(&sta->lock);
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*state = HT_AGG_STATE_IDLE;
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "timer expired on tid %d but we are not "
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"expecting addBA response there", tid);
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#endif
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goto timer_expired_exit;
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}
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
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#endif
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/* go through the state check in stop_BA_session */
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*state = HT_AGG_STATE_OPERATIONAL;
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spin_unlock_bh(&sta->lock);
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ieee80211_stop_tx_ba_session(hw, temp_sta->sta.addr, tid,
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WLAN_BACK_INITIATOR);
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timer_expired_exit:
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rcu_read_unlock();
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}
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int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct sta_info *sta;
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struct ieee80211_sub_if_data *sdata;
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u16 start_seq_num;
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u8 *state;
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int ret = 0;
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if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
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return -EINVAL;
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
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ra, tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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rcu_read_lock();
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sta = sta_info_get(local, ra);
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if (!sta) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Could not find the station\n");
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#endif
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ret = -ENOENT;
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goto exit;
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}
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spin_lock_bh(&sta->lock);
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/* we have tried too many times, receiver does not want A-MPDU */
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if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
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ret = -EBUSY;
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goto err_unlock_sta;
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}
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state = &sta->ampdu_mlme.tid_state_tx[tid];
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/* check if the TID is not in aggregation flow already */
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if (*state != HT_AGG_STATE_IDLE) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "BA request denied - session is not "
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"idle on tid %u\n", tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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ret = -EAGAIN;
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goto err_unlock_sta;
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}
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/* prepare A-MPDU MLME for Tx aggregation */
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sta->ampdu_mlme.tid_tx[tid] =
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kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
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if (!sta->ampdu_mlme.tid_tx[tid]) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
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tid);
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#endif
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ret = -ENOMEM;
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goto err_unlock_sta;
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}
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/* Tx timer */
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sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
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sta_addba_resp_timer_expired;
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sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
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(unsigned long)&sta->timer_to_tid[tid];
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init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
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if (hw->ampdu_queues) {
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/* create a new queue for this aggregation */
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ret = ieee80211_ht_agg_queue_add(local, sta, tid);
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/* case no queue is available to aggregation
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* don't switch to aggregation */
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if (ret) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "BA request denied - "
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"queue unavailable for tid %d\n", tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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goto err_unlock_queue;
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}
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}
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sdata = sta->sdata;
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/* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
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* call back right away, it must see that the flow has begun */
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*state |= HT_ADDBA_REQUESTED_MSK;
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/* This is slightly racy because the queue isn't stopped */
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start_seq_num = sta->tid_seq[tid];
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if (local->ops->ampdu_action)
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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
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&sta->sta, tid, &start_seq_num);
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if (ret) {
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/* No need to requeue the packets in the agg queue, since we
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* held the tx lock: no packet could be enqueued to the newly
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* allocated queue */
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if (hw->ampdu_queues)
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ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "BA request denied - HW unavailable for"
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" tid %d\n", tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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*state = HT_AGG_STATE_IDLE;
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goto err_unlock_queue;
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}
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/* Will put all the packets in the new SW queue */
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if (hw->ampdu_queues)
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ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
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spin_unlock_bh(&sta->lock);
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/* send an addBA request */
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sta->ampdu_mlme.dialog_token_allocator++;
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sta->ampdu_mlme.tid_tx[tid]->dialog_token =
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sta->ampdu_mlme.dialog_token_allocator;
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sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
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ieee80211_send_addba_request(sta->sdata, ra, tid,
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sta->ampdu_mlme.tid_tx[tid]->dialog_token,
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sta->ampdu_mlme.tid_tx[tid]->ssn,
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0x40, 5000);
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/* activate the timer for the recipient's addBA response */
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sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
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jiffies + ADDBA_RESP_INTERVAL;
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add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
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#endif
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goto exit;
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err_unlock_queue:
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kfree(sta->ampdu_mlme.tid_tx[tid]);
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sta->ampdu_mlme.tid_tx[tid] = NULL;
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ret = -EBUSY;
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err_unlock_sta:
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spin_unlock_bh(&sta->lock);
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exit:
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rcu_read_unlock();
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return ret;
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}
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EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
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void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct sta_info *sta;
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u8 *state;
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if (tid >= STA_TID_NUM) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
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tid, STA_TID_NUM);
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#endif
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return;
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}
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rcu_read_lock();
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sta = sta_info_get(local, ra);
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if (!sta) {
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rcu_read_unlock();
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Could not find station: %pM\n", ra);
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#endif
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return;
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}
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state = &sta->ampdu_mlme.tid_state_tx[tid];
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spin_lock_bh(&sta->lock);
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if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
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*state);
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#endif
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spin_unlock_bh(&sta->lock);
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rcu_read_unlock();
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return;
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}
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WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
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*state |= HT_ADDBA_DRV_READY_MSK;
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if (*state == HT_AGG_STATE_OPERATIONAL) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
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#endif
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if (hw->ampdu_queues)
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|
|
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
|
||
|
|
}
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
rcu_read_unlock();
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
|
||
|
|
|
||
|
|
|
||
|
|
int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
|
||
|
|
u8 *ra, u16 tid,
|
||
|
|
enum ieee80211_back_parties initiator)
|
||
|
|
{
|
||
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
||
|
|
struct sta_info *sta;
|
||
|
|
u8 *state;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
if (tid >= STA_TID_NUM)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
rcu_read_lock();
|
||
|
|
sta = sta_info_get(local, ra);
|
||
|
|
if (!sta) {
|
||
|
|
rcu_read_unlock();
|
||
|
|
return -ENOENT;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check if the TID is in aggregation */
|
||
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||
|
|
spin_lock_bh(&sta->lock);
|
||
|
|
|
||
|
|
if (*state != HT_AGG_STATE_OPERATIONAL) {
|
||
|
|
ret = -ENOENT;
|
||
|
|
goto stop_BA_exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
|
||
|
|
ra, tid);
|
||
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
|
|
||
|
|
if (hw->ampdu_queues)
|
||
|
|
ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
|
||
|
|
|
||
|
|
*state = HT_AGG_STATE_REQ_STOP_BA_MSK |
|
||
|
|
(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
|
||
|
|
|
||
|
|
if (local->ops->ampdu_action)
|
||
|
|
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
|
||
|
|
&sta->sta, tid, NULL);
|
||
|
|
|
||
|
|
/* case HW denied going back to legacy */
|
||
|
|
if (ret) {
|
||
|
|
WARN_ON(ret != -EBUSY);
|
||
|
|
*state = HT_AGG_STATE_OPERATIONAL;
|
||
|
|
if (hw->ampdu_queues)
|
||
|
|
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
|
||
|
|
goto stop_BA_exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
stop_BA_exit:
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
rcu_read_unlock();
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
|
||
|
|
|
||
|
|
void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
|
||
|
|
{
|
||
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
||
|
|
struct sta_info *sta;
|
||
|
|
u8 *state;
|
||
|
|
int agg_queue;
|
||
|
|
|
||
|
|
if (tid >= STA_TID_NUM) {
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
|
||
|
|
tid, STA_TID_NUM);
|
||
|
|
#endif
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
|
||
|
|
ra, tid);
|
||
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
|
|
||
|
|
rcu_read_lock();
|
||
|
|
sta = sta_info_get(local, ra);
|
||
|
|
if (!sta) {
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "Could not find station: %pM\n", ra);
|
||
|
|
#endif
|
||
|
|
rcu_read_unlock();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||
|
|
|
||
|
|
/* NOTE: no need to use sta->lock in this state check, as
|
||
|
|
* ieee80211_stop_tx_ba_session will let only one stop call to
|
||
|
|
* pass through per sta/tid
|
||
|
|
*/
|
||
|
|
if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
|
||
|
|
#endif
|
||
|
|
rcu_read_unlock();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (*state & HT_AGG_STATE_INITIATOR_MSK)
|
||
|
|
ieee80211_send_delba(sta->sdata, ra, tid,
|
||
|
|
WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
|
||
|
|
|
||
|
|
if (hw->ampdu_queues) {
|
||
|
|
agg_queue = sta->tid_to_tx_q[tid];
|
||
|
|
ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
|
||
|
|
|
||
|
|
/* We just requeued the all the frames that were in the
|
||
|
|
* removed queue, and since we might miss a softirq we do
|
||
|
|
* netif_schedule_queue. ieee80211_wake_queue is not used
|
||
|
|
* here as this queue is not necessarily stopped
|
||
|
|
*/
|
||
|
|
netif_schedule_queue(netdev_get_tx_queue(local->mdev,
|
||
|
|
agg_queue));
|
||
|
|
}
|
||
|
|
spin_lock_bh(&sta->lock);
|
||
|
|
*state = HT_AGG_STATE_IDLE;
|
||
|
|
sta->ampdu_mlme.addba_req_num[tid] = 0;
|
||
|
|
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
||
|
|
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
|
||
|
|
rcu_read_unlock();
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
|
||
|
|
|
||
|
|
void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
|
||
|
|
const u8 *ra, u16 tid)
|
||
|
|
{
|
||
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
||
|
|
struct ieee80211_ra_tid *ra_tid;
|
||
|
|
struct sk_buff *skb = dev_alloc_skb(0);
|
||
|
|
|
||
|
|
if (unlikely(!skb)) {
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
if (net_ratelimit())
|
||
|
|
printk(KERN_WARNING "%s: Not enough memory, "
|
||
|
|
"dropping start BA session", skb->dev->name);
|
||
|
|
#endif
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
|
||
|
|
memcpy(&ra_tid->ra, ra, ETH_ALEN);
|
||
|
|
ra_tid->tid = tid;
|
||
|
|
|
||
|
|
skb->pkt_type = IEEE80211_ADDBA_MSG;
|
||
|
|
skb_queue_tail(&local->skb_queue, skb);
|
||
|
|
tasklet_schedule(&local->tasklet);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
|
||
|
|
|
||
|
|
void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
|
||
|
|
const u8 *ra, u16 tid)
|
||
|
|
{
|
||
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
||
|
|
struct ieee80211_ra_tid *ra_tid;
|
||
|
|
struct sk_buff *skb = dev_alloc_skb(0);
|
||
|
|
|
||
|
|
if (unlikely(!skb)) {
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
if (net_ratelimit())
|
||
|
|
printk(KERN_WARNING "%s: Not enough memory, "
|
||
|
|
"dropping stop BA session", skb->dev->name);
|
||
|
|
#endif
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
|
||
|
|
memcpy(&ra_tid->ra, ra, ETH_ALEN);
|
||
|
|
ra_tid->tid = tid;
|
||
|
|
|
||
|
|
skb->pkt_type = IEEE80211_DELBA_MSG;
|
||
|
|
skb_queue_tail(&local->skb_queue, skb);
|
||
|
|
tasklet_schedule(&local->tasklet);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
|
||
|
|
|
||
|
|
void ieee80211_process_addba_resp(struct ieee80211_local *local,
|
||
|
|
struct sta_info *sta,
|
||
|
|
struct ieee80211_mgmt *mgmt,
|
||
|
|
size_t len)
|
||
|
|
{
|
||
|
|
struct ieee80211_hw *hw = &local->hw;
|
||
|
|
u16 capab;
|
||
|
|
u16 tid, start_seq_num;
|
||
|
|
u8 *state;
|
||
|
|
|
||
|
|
capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
|
||
|
|
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
|
||
|
|
|
||
|
|
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||
|
|
|
||
|
|
spin_lock_bh(&sta->lock);
|
||
|
|
|
||
|
|
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mgmt->u.action.u.addba_resp.dialog_token !=
|
||
|
|
sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
|
||
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
|
||
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
|
if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
|
||
|
|
== WLAN_STATUS_SUCCESS) {
|
||
|
|
*state |= HT_ADDBA_RECEIVED_MSK;
|
||
|
|
sta->ampdu_mlme.addba_req_num[tid] = 0;
|
||
|
|
|
||
|
|
if (*state == HT_AGG_STATE_OPERATIONAL &&
|
||
|
|
local->hw.ampdu_queues)
|
||
|
|
ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
|
||
|
|
|
||
|
|
if (local->ops->ampdu_action) {
|
||
|
|
(void)local->ops->ampdu_action(hw,
|
||
|
|
IEEE80211_AMPDU_TX_RESUME,
|
||
|
|
&sta->sta, tid, &start_seq_num);
|
||
|
|
}
|
||
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||
|
|
printk(KERN_DEBUG "Resuming TX aggregation for tid %d\n", tid);
|
||
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
} else {
|
||
|
|
sta->ampdu_mlme.addba_req_num[tid]++;
|
||
|
|
/* this will allow the state check in stop_BA_session */
|
||
|
|
*state = HT_AGG_STATE_OPERATIONAL;
|
||
|
|
spin_unlock_bh(&sta->lock);
|
||
|
|
ieee80211_stop_tx_ba_session(hw, sta->sta.addr, tid,
|
||
|
|
WLAN_BACK_INITIATOR);
|
||
|
|
}
|
||
|
|
}
|