forked from Minki/linux
3b8d81e020
With the internal 'pending' queue system in place, we can simply put packets there instead of pushing them off to the master dev, getting rid of the master interface completely. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
696 lines
19 KiB
C
696 lines
19 KiB
C
/*
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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 "driver-ops.h"
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#include "wme.h"
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/**
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* DOC: TX aggregation
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*
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* Aggregation on the TX side requires setting the hardware flag
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* %IEEE80211_HW_AMPDU_AGGREGATION as well as, if present, the @ampdu_queues
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* hardware parameter to the number of hardware AMPDU queues. If there are no
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* hardware queues then the driver will (currently) have to do all frame
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* buffering.
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*
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* When TX aggregation is started by some subsystem (usually the rate control
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* algorithm would be appropriate) by calling the
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* ieee80211_start_tx_ba_session() function, the driver will be notified via
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* its @ampdu_action function, with the %IEEE80211_AMPDU_TX_START action.
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*
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* In response to that, the driver is later required to call the
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* ieee80211_start_tx_ba_cb() (or ieee80211_start_tx_ba_cb_irqsafe())
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* function, which will start the aggregation session.
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*
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* Similarly, when the aggregation session is stopped by
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* ieee80211_stop_tx_ba_session(), the driver's @ampdu_action function will
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* be called with the action %IEEE80211_AMPDU_TX_STOP. In this case, the
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* call must not fail, and the driver must later call ieee80211_stop_tx_ba_cb()
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* (or ieee80211_stop_tx_ba_cb_irqsafe()).
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*/
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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 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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sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
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memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
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else if (sdata->vif.type == NL80211_IFTYPE_STATION)
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memcpy(mgmt->bssid, sdata->u.mgd.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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static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
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enum ieee80211_back_parties initiator)
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{
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struct ieee80211_local *local = sta->local;
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int ret;
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u8 *state;
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state = &sta->ampdu_mlme.tid_state_tx[tid];
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if (*state == HT_AGG_STATE_OPERATIONAL)
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sta->ampdu_mlme.addba_req_num[tid] = 0;
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*state = HT_AGG_STATE_REQ_STOP_BA_MSK |
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(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
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ret = drv_ampdu_action(local, IEEE80211_AMPDU_TX_STOP,
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&sta->sta, tid, NULL);
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/* HW shall not deny going back to legacy */
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if (WARN_ON(ret)) {
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*state = HT_AGG_STATE_OPERATIONAL;
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/*
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* We may have pending packets get stuck in this case...
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* Not bothering with a workaround for now.
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*/
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}
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return ret;
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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 *sta = container_of((void *)data,
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struct sta_info, timer_to_tid[tid]);
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u8 *state;
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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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return;
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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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___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
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spin_unlock_bh(&sta->lock);
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}
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static inline int ieee80211_ac_from_tid(int tid)
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{
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return ieee802_1d_to_ac[tid & 7];
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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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u8 *state;
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int ret = 0;
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u16 start_seq_num;
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if (WARN_ON(!local->ops->ampdu_action))
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return -EINVAL;
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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 unlock;
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}
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/*
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* The aggregation code is not prepared to handle
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* anything but STA/AP due to the BSSID handling.
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* IBSS could work in the code but isn't supported
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* by drivers or the standard.
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*/
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if (sta->sdata->vif.type != NL80211_IFTYPE_STATION &&
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sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
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sta->sdata->vif.type != NL80211_IFTYPE_AP) {
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ret = -EINVAL;
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goto unlock;
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}
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if (test_sta_flags(sta, WLAN_STA_SUSPEND)) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Suspend in progress. "
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"Denying BA session request\n");
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#endif
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ret = -EINVAL;
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goto unlock;
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}
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spin_lock_bh(&sta->lock);
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spin_lock(&local->ampdu_lock);
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sdata = sta->sdata;
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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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/*
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* While we're asking the driver about the aggregation,
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* stop the AC queue so that we don't have to worry
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* about frames that came in while we were doing that,
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* which would require us to put them to the AC pending
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* afterwards which just makes the code more complex.
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*/
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ieee80211_stop_queue_by_reason(
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&local->hw, ieee80211_ac_from_tid(tid),
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IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
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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_wake_queue;
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}
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skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
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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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/* 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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start_seq_num = sta->tid_seq[tid];
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ret = drv_ampdu_action(local, IEEE80211_AMPDU_TX_START,
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&sta->sta, tid, &start_seq_num);
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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 - 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_free;
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}
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/* Driver vetoed or OKed, but we can take packets again now */
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ieee80211_wake_queue_by_reason(
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&local->hw, ieee80211_ac_from_tid(tid),
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IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
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spin_unlock(&local->ampdu_lock);
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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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sta->ampdu_mlme.addba_req_num[tid]++;
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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 unlock;
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err_free:
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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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err_wake_queue:
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ieee80211_wake_queue_by_reason(
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&local->hw, ieee80211_ac_from_tid(tid),
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IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
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err_unlock_sta:
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spin_unlock(&local->ampdu_lock);
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spin_unlock_bh(&sta->lock);
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unlock:
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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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/*
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* splice packets from the STA's pending to the local pending,
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* requires a call to ieee80211_agg_splice_finish and holding
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* local->ampdu_lock across both calls.
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*/
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static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
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struct sta_info *sta, u16 tid)
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{
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unsigned long flags;
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u16 queue = ieee80211_ac_from_tid(tid);
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ieee80211_stop_queue_by_reason(
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&local->hw, queue,
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IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
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if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
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spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
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/* copy over remaining packets */
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skb_queue_splice_tail_init(
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&sta->ampdu_mlme.tid_tx[tid]->pending,
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&local->pending[queue]);
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spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
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}
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}
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static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
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struct sta_info *sta, u16 tid)
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{
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u16 queue = ieee80211_ac_from_tid(tid);
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ieee80211_wake_queue_by_reason(
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&local->hw, queue,
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IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
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}
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/* caller must hold sta->lock */
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static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
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struct sta_info *sta, u16 tid)
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{
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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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spin_lock(&local->ampdu_lock);
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ieee80211_agg_splice_packets(local, sta, tid);
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/*
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* NB: we rely on sta->lock being taken in the TX
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* processing here when adding to the pending queue,
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* otherwise we could only change the state of the
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* session to OPERATIONAL _here_.
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*/
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ieee80211_agg_splice_finish(local, sta, tid);
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spin_unlock(&local->ampdu_lock);
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drv_ampdu_action(local, IEEE80211_AMPDU_TX_OPERATIONAL,
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&sta->sta, tid, NULL);
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}
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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 (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
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|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
|
printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
|
|
*state);
|
|
#endif
|
|
spin_unlock_bh(&sta->lock);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
|
|
goto out;
|
|
|
|
*state |= HT_ADDBA_DRV_READY_MSK;
|
|
|
|
if (*state == HT_AGG_STATE_OPERATIONAL)
|
|
ieee80211_agg_tx_operational(local, sta, tid);
|
|
|
|
out:
|
|
spin_unlock_bh(&sta->lock);
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_start_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);
|
|
|
|
int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
|
|
enum ieee80211_back_parties initiator)
|
|
{
|
|
u8 *state;
|
|
int ret;
|
|
|
|
/* 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 unlock;
|
|
}
|
|
|
|
#ifdef CONFIG_MAC80211_HT_DEBUG
|
|
printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
|
|
sta->sta.addr, tid);
|
|
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
|
|
|
ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
|
|
|
|
unlock:
|
|
spin_unlock_bh(&sta->lock);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
int ret = 0;
|
|
|
|
if (WARN_ON(!local->ops->ampdu_action))
|
|
return -EINVAL;
|
|
|
|
if (tid >= STA_TID_NUM)
|
|
return -EINVAL;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(local, ra);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
return -ENOENT;
|
|
}
|
|
|
|
ret = __ieee80211_stop_tx_ba_session(sta, tid, initiator);
|
|
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;
|
|
|
|
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);
|
|
|
|
spin_lock_bh(&sta->lock);
|
|
spin_lock(&local->ampdu_lock);
|
|
|
|
ieee80211_agg_splice_packets(local, sta, tid);
|
|
|
|
*state = HT_AGG_STATE_IDLE;
|
|
/* from now on packets are no longer put onto sta->pending */
|
|
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
|
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
|
|
|
ieee80211_agg_splice_finish(local, sta, tid);
|
|
|
|
spin_unlock(&local->ampdu_lock);
|
|
spin_unlock_bh(&sta->lock);
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
|
|
|
|
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)
|
|
{
|
|
u16 capab, tid;
|
|
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) {
|
|
u8 curstate = *state;
|
|
|
|
*state |= HT_ADDBA_RECEIVED_MSK;
|
|
|
|
if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
|
|
ieee80211_agg_tx_operational(local, sta, tid);
|
|
|
|
sta->ampdu_mlme.addba_req_num[tid] = 0;
|
|
} else {
|
|
___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
|
|
}
|
|
spin_unlock_bh(&sta->lock);
|
|
}
|