mac80211: restructure HT code
Create two new files, agg-tx.c and agg-rx.c to make it clearer which code is common (ht.c) and which is specific (agg-*.c). Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
parent
20ad19d0ac
commit
b8695a8fe6
@ -8,7 +8,7 @@ mac80211-y := \
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wep.o \
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wpa.o \
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scan.o \
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ht.o \
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ht.o agg-tx.o agg-rx.o \
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mlme.o \
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iface.o \
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rate.o \
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287
net/mac80211/agg-rx.c
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287
net/mac80211/agg-rx.c
Normal file
@ -0,0 +1,287 @@
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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 2007-2008, 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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void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
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u16 initiator, u16 reason)
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{
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_hw *hw = &local->hw;
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struct sta_info *sta;
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int ret, i;
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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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return;
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}
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/* check if TID is in operational state */
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spin_lock_bh(&sta->lock);
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if (sta->ampdu_mlme.tid_state_rx[tid]
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!= HT_AGG_STATE_OPERATIONAL) {
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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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sta->ampdu_mlme.tid_state_rx[tid] =
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HT_AGG_STATE_REQ_STOP_BA_MSK |
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(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
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spin_unlock_bh(&sta->lock);
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/* stop HW Rx aggregation. ampdu_action existence
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* already verified in session init so we add the BUG_ON */
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BUG_ON(!local->ops->ampdu_action);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Rx BA session stop 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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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
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&sta->sta, tid, NULL);
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if (ret)
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printk(KERN_DEBUG "HW problem - can not stop rx "
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"aggregation for tid %d\n", tid);
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/* shutdown timer has not expired */
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if (initiator != WLAN_BACK_TIMER)
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del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
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/* check if this is a self generated aggregation halt */
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if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
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ieee80211_send_delba(sdata, ra, tid, 0, reason);
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/* free the reordering buffer */
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for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
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if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
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/* release the reordered frames */
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dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
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sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
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sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
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}
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}
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/* free resources */
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kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
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kfree(sta->ampdu_mlme.tid_rx[tid]);
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sta->ampdu_mlme.tid_rx[tid] = NULL;
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sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
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rcu_read_unlock();
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}
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/*
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* After accepting the AddBA Request we activated a timer,
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* resetting it after each frame that arrives from the originator.
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* if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
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*/
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static void sta_rx_agg_session_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 various sta_info are needed here, 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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u8 *ptid = (u8 *)data;
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u8 *timer_to_id = ptid - *ptid;
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struct sta_info *sta = container_of(timer_to_id, struct sta_info,
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timer_to_tid[0]);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
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#endif
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ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
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(u16)*ptid, WLAN_BACK_TIMER,
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WLAN_REASON_QSTA_TIMEOUT);
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}
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static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
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u8 dialog_token, u16 status, u16 policy,
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u16 buf_size, u16 timeout)
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{
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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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_DEBUG "%s: failed to allocate buffer "
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"for addba resp 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_resp));
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mgmt->u.action.category = WLAN_CATEGORY_BACK;
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mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
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mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
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capab = (u16)(policy << 1); /* bit 1 aggregation policy */
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capab |= (u16)(tid << 2); /* bit 5:2 TID number */
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capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
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mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
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mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
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mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
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ieee80211_tx_skb(sdata, skb, 1);
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}
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void ieee80211_process_addba_request(struct ieee80211_local *local,
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struct sta_info *sta,
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struct ieee80211_mgmt *mgmt,
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size_t len)
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{
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struct ieee80211_hw *hw = &local->hw;
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struct ieee80211_conf *conf = &hw->conf;
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struct tid_ampdu_rx *tid_agg_rx;
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u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
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u8 dialog_token;
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int ret = -EOPNOTSUPP;
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/* extract session parameters from addba request frame */
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dialog_token = mgmt->u.action.u.addba_req.dialog_token;
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timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
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start_seq_num =
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le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
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capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
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ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
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tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
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buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
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status = WLAN_STATUS_REQUEST_DECLINED;
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/* sanity check for incoming parameters:
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* check if configuration can support the BA policy
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* and if buffer size does not exceeds max value */
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/* XXX: check own ht delayed BA capability?? */
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if (((ba_policy != 1)
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&& (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA)))
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|| (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
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status = WLAN_STATUS_INVALID_QOS_PARAM;
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "AddBA Req with bad params from "
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"%pM on tid %u. policy %d, buffer size %d\n",
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mgmt->sa, tid, ba_policy,
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buf_size);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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goto end_no_lock;
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}
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/* determine default buffer size */
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if (buf_size == 0) {
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struct ieee80211_supported_band *sband;
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sband = local->hw.wiphy->bands[conf->channel->band];
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buf_size = IEEE80211_MIN_AMPDU_BUF;
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buf_size = buf_size << sband->ht_cap.ampdu_factor;
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}
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/* examine state machine */
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spin_lock_bh(&sta->lock);
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if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "unexpected AddBA Req from "
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"%pM on tid %u\n",
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mgmt->sa, tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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goto end;
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}
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/* prepare A-MPDU MLME for Rx aggregation */
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sta->ampdu_mlme.tid_rx[tid] =
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kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
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if (!sta->ampdu_mlme.tid_rx[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 rx mlme to tid %d failed\n",
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tid);
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#endif
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goto end;
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}
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/* rx timer */
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sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
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sta_rx_agg_session_timer_expired;
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sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
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(unsigned long)&sta->timer_to_tid[tid];
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init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
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tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
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/* prepare reordering buffer */
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tid_agg_rx->reorder_buf =
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kcalloc(buf_size, sizeof(struct sk_buff *), GFP_ATOMIC);
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if (!tid_agg_rx->reorder_buf) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_ERR "can not allocate reordering buffer "
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"to tid %d\n", tid);
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#endif
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kfree(sta->ampdu_mlme.tid_rx[tid]);
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goto end;
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}
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if (local->ops->ampdu_action)
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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
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&sta->sta, tid, &start_seq_num);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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if (ret) {
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kfree(tid_agg_rx->reorder_buf);
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kfree(tid_agg_rx);
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sta->ampdu_mlme.tid_rx[tid] = NULL;
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goto end;
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}
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/* change state and send addba resp */
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sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
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tid_agg_rx->dialog_token = dialog_token;
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tid_agg_rx->ssn = start_seq_num;
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tid_agg_rx->head_seq_num = start_seq_num;
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tid_agg_rx->buf_size = buf_size;
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tid_agg_rx->timeout = timeout;
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tid_agg_rx->stored_mpdu_num = 0;
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status = WLAN_STATUS_SUCCESS;
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end:
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spin_unlock_bh(&sta->lock);
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end_no_lock:
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ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
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dialog_token, status, 1, buf_size, timeout);
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}
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593
net/mac80211/agg-tx.c
Normal file
593
net/mac80211/agg-tx.c
Normal file
@ -0,0 +1,593 @@
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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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*/
|
||||
static void sta_addba_resp_timer_expired(unsigned long data)
|
||||
{
|
||||
/* not an elegant detour, but there is no choice as the timer passes
|
||||
* only one argument, and both sta_info and TID are needed, so init
|
||||
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
||||
* array gives the sta through container_of */
|
||||
u16 tid = *(u8 *)data;
|
||||
struct sta_info *temp_sta = container_of((void *)data,
|
||||
struct sta_info, timer_to_tid[tid]);
|
||||
|
||||
struct ieee80211_local *local = temp_sta->local;
|
||||
struct ieee80211_hw *hw = &local->hw;
|
||||
struct sta_info *sta;
|
||||
u8 *state;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
sta = sta_info_get(local, temp_sta->sta.addr);
|
||||
if (!sta) {
|
||||
rcu_read_unlock();
|
||||
return;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
/* check if the TID waits for addBA response */
|
||||
spin_lock_bh(&sta->lock);
|
||||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||||
spin_unlock_bh(&sta->lock);
|
||||
*state = HT_AGG_STATE_IDLE;
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "timer expired on tid %d but we are not "
|
||||
"expecting addBA response there", tid);
|
||||
#endif
|
||||
goto timer_expired_exit;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
|
||||
#endif
|
||||
|
||||
/* go through the state check in stop_BA_session */
|
||||
*state = HT_AGG_STATE_OPERATIONAL;
|
||||
spin_unlock_bh(&sta->lock);
|
||||
ieee80211_stop_tx_ba_session(hw, temp_sta->sta.addr, tid,
|
||||
WLAN_BACK_INITIATOR);
|
||||
|
||||
timer_expired_exit:
|
||||
rcu_read_unlock();
|
||||
}
|
||||
|
||||
int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
|
||||
{
|
||||
struct ieee80211_local *local = hw_to_local(hw);
|
||||
struct sta_info *sta;
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
u16 start_seq_num;
|
||||
u8 *state;
|
||||
int ret = 0;
|
||||
|
||||
if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
|
||||
return -EINVAL;
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Open BA session requested for %pM tid %u\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 the station\n");
|
||||
#endif
|
||||
ret = -ENOENT;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
spin_lock_bh(&sta->lock);
|
||||
|
||||
/* we have tried too many times, receiver does not want A-MPDU */
|
||||
if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
|
||||
ret = -EBUSY;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
/* check if the TID is not in aggregation flow already */
|
||||
if (*state != HT_AGG_STATE_IDLE) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - session is not "
|
||||
"idle on tid %u\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
ret = -EAGAIN;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
|
||||
/* prepare A-MPDU MLME for Tx aggregation */
|
||||
sta->ampdu_mlme.tid_tx[tid] =
|
||||
kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
|
||||
if (!sta->ampdu_mlme.tid_tx[tid]) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
|
||||
tid);
|
||||
#endif
|
||||
ret = -ENOMEM;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
/* Tx timer */
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
|
||||
sta_addba_resp_timer_expired;
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
|
||||
(unsigned long)&sta->timer_to_tid[tid];
|
||||
init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||||
|
||||
if (hw->ampdu_queues) {
|
||||
/* create a new queue for this aggregation */
|
||||
ret = ieee80211_ht_agg_queue_add(local, sta, tid);
|
||||
|
||||
/* case no queue is available to aggregation
|
||||
* don't switch to aggregation */
|
||||
if (ret) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - "
|
||||
"queue unavailable for tid %d\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
goto err_unlock_queue;
|
||||
}
|
||||
}
|
||||
sdata = sta->sdata;
|
||||
|
||||
/* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
|
||||
* call back right away, it must see that the flow has begun */
|
||||
*state |= HT_ADDBA_REQUESTED_MSK;
|
||||
|
||||
/* This is slightly racy because the queue isn't stopped */
|
||||
start_seq_num = sta->tid_seq[tid];
|
||||
|
||||
if (local->ops->ampdu_action)
|
||||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
|
||||
&sta->sta, tid, &start_seq_num);
|
||||
|
||||
if (ret) {
|
||||
/* No need to requeue the packets in the agg queue, since we
|
||||
* held the tx lock: no packet could be enqueued to the newly
|
||||
* allocated queue */
|
||||
if (hw->ampdu_queues)
|
||||
ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - HW unavailable for"
|
||||
" tid %d\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
*state = HT_AGG_STATE_IDLE;
|
||||
goto err_unlock_queue;
|
||||
}
|
||||
|
||||
/* Will put all the packets in the new SW queue */
|
||||
if (hw->ampdu_queues)
|
||||
ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
|
||||
spin_unlock_bh(&sta->lock);
|
||||
|
||||
/* send an addBA request */
|
||||
sta->ampdu_mlme.dialog_token_allocator++;
|
||||
sta->ampdu_mlme.tid_tx[tid]->dialog_token =
|
||||
sta->ampdu_mlme.dialog_token_allocator;
|
||||
sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
|
||||
|
||||
|
||||
ieee80211_send_addba_request(sta->sdata, ra, tid,
|
||||
sta->ampdu_mlme.tid_tx[tid]->dialog_token,
|
||||
sta->ampdu_mlme.tid_tx[tid]->ssn,
|
||||
0x40, 5000);
|
||||
/* activate the timer for the recipient's addBA response */
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
|
||||
jiffies + ADDBA_RESP_INTERVAL;
|
||||
add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
|
||||
#endif
|
||||
goto exit;
|
||||
|
||||
err_unlock_queue:
|
||||
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
||||
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
||||
ret = -EBUSY;
|
||||
err_unlock_sta:
|
||||
spin_unlock_bh(&sta->lock);
|
||||
exit:
|
||||
rcu_read_unlock();
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
|
||||
|
||||
void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 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;
|
||||
}
|
||||
|
||||
rcu_read_lock();
|
||||
sta = sta_info_get(local, ra);
|
||||
if (!sta) {
|
||||
rcu_read_unlock();
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Could not find station: %pM\n", ra);
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
spin_lock_bh(&sta->lock);
|
||||
|
||||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||||
#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;
|
||||
}
|
||||
|
||||
WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
|
||||
|
||||
*state |= HT_ADDBA_DRV_READY_MSK;
|
||||
|
||||
if (*state == HT_AGG_STATE_OPERATIONAL) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
|
||||
#endif
|
||||
if (hw->ampdu_queues)
|
||||
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);
|
||||
}
|
||||
}
|
@ -17,8 +17,6 @@
|
||||
#include <net/wireless.h>
|
||||
#include <net/mac80211.h>
|
||||
#include "ieee80211_i.h"
|
||||
#include "sta_info.h"
|
||||
#include "wme.h"
|
||||
|
||||
void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
|
||||
struct ieee80211_ht_cap *ht_cap_ie,
|
||||
@ -155,105 +153,23 @@ u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
|
||||
return changed;
|
||||
}
|
||||
|
||||
static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
|
||||
const u8 *da, u16 tid,
|
||||
u8 dialog_token, u16 start_seq_num,
|
||||
u16 agg_size, u16 timeout)
|
||||
void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_mgmt *mgmt;
|
||||
u16 capab;
|
||||
int i;
|
||||
|
||||
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
|
||||
|
||||
if (!skb) {
|
||||
printk(KERN_ERR "%s: failed to allocate buffer "
|
||||
"for addba request frame\n", sdata->dev->name);
|
||||
return;
|
||||
for (i = 0; i < STA_TID_NUM; i++) {
|
||||
ieee80211_stop_tx_ba_session(&local->hw, addr, i,
|
||||
WLAN_BACK_INITIATOR);
|
||||
ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
|
||||
WLAN_BACK_RECIPIENT,
|
||||
WLAN_REASON_QSTA_LEAVE_QBSS);
|
||||
}
|
||||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||||
memset(mgmt, 0, 24);
|
||||
memcpy(mgmt->da, da, ETH_ALEN);
|
||||
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
||||
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
||||
memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
|
||||
else
|
||||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||||
|
||||
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
||||
IEEE80211_STYPE_ACTION);
|
||||
|
||||
skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
|
||||
|
||||
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
||||
mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
|
||||
|
||||
mgmt->u.action.u.addba_req.dialog_token = dialog_token;
|
||||
capab = (u16)(1 << 1); /* bit 1 aggregation policy */
|
||||
capab |= (u16)(tid << 2); /* bit 5:2 TID number */
|
||||
capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
|
||||
|
||||
mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
|
||||
|
||||
mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
|
||||
mgmt->u.action.u.addba_req.start_seq_num =
|
||||
cpu_to_le16(start_seq_num << 4);
|
||||
|
||||
ieee80211_tx_skb(sdata, skb, 1);
|
||||
}
|
||||
|
||||
static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
|
||||
u8 dialog_token, u16 status, u16 policy,
|
||||
u16 buf_size, u16 timeout)
|
||||
{
|
||||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_mgmt *mgmt;
|
||||
u16 capab;
|
||||
|
||||
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
|
||||
|
||||
if (!skb) {
|
||||
printk(KERN_DEBUG "%s: failed to allocate buffer "
|
||||
"for addba resp frame\n", sdata->dev->name);
|
||||
return;
|
||||
}
|
||||
|
||||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||||
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
|
||||
memset(mgmt, 0, 24);
|
||||
memcpy(mgmt->da, da, ETH_ALEN);
|
||||
memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
|
||||
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
||||
memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
|
||||
else
|
||||
memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
|
||||
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
||||
IEEE80211_STYPE_ACTION);
|
||||
|
||||
skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
|
||||
mgmt->u.action.category = WLAN_CATEGORY_BACK;
|
||||
mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
|
||||
mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
|
||||
|
||||
capab = (u16)(policy << 1); /* bit 1 aggregation policy */
|
||||
capab |= (u16)(tid << 2); /* bit 5:2 TID number */
|
||||
capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
|
||||
|
||||
mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
|
||||
mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
|
||||
mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
|
||||
|
||||
ieee80211_tx_skb(sdata, skb, 1);
|
||||
}
|
||||
|
||||
static void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
|
||||
const u8 *da, u16 tid,
|
||||
u16 initiator, u16 reason_code)
|
||||
void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
|
||||
const u8 *da, u16 tid,
|
||||
u16 initiator, u16 reason_code)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_if_sta *ifsta = &sdata->u.sta;
|
||||
@ -294,767 +210,6 @@ static void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
|
||||
ieee80211_tx_skb(sdata, skb, 1);
|
||||
}
|
||||
|
||||
void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_bar *bar;
|
||||
u16 bar_control = 0;
|
||||
|
||||
skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
|
||||
if (!skb) {
|
||||
printk(KERN_ERR "%s: failed to allocate buffer for "
|
||||
"bar frame\n", sdata->dev->name);
|
||||
return;
|
||||
}
|
||||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||||
bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
|
||||
memset(bar, 0, sizeof(*bar));
|
||||
bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
|
||||
IEEE80211_STYPE_BACK_REQ);
|
||||
memcpy(bar->ra, ra, ETH_ALEN);
|
||||
memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
|
||||
bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
|
||||
bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
|
||||
bar_control |= (u16)(tid << 12);
|
||||
bar->control = cpu_to_le16(bar_control);
|
||||
bar->start_seq_num = cpu_to_le16(ssn);
|
||||
|
||||
ieee80211_tx_skb(sdata, skb, 0);
|
||||
}
|
||||
|
||||
void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
|
||||
u16 initiator, u16 reason)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
struct ieee80211_hw *hw = &local->hw;
|
||||
struct sta_info *sta;
|
||||
int ret, i;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
sta = sta_info_get(local, ra);
|
||||
if (!sta) {
|
||||
rcu_read_unlock();
|
||||
return;
|
||||
}
|
||||
|
||||
/* check if TID is in operational state */
|
||||
spin_lock_bh(&sta->lock);
|
||||
if (sta->ampdu_mlme.tid_state_rx[tid]
|
||||
!= HT_AGG_STATE_OPERATIONAL) {
|
||||
spin_unlock_bh(&sta->lock);
|
||||
rcu_read_unlock();
|
||||
return;
|
||||
}
|
||||
sta->ampdu_mlme.tid_state_rx[tid] =
|
||||
HT_AGG_STATE_REQ_STOP_BA_MSK |
|
||||
(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
|
||||
spin_unlock_bh(&sta->lock);
|
||||
|
||||
/* stop HW Rx aggregation. ampdu_action existence
|
||||
* already verified in session init so we add the BUG_ON */
|
||||
BUG_ON(!local->ops->ampdu_action);
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Rx BA session stop requested for %pM tid %u\n",
|
||||
ra, tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
|
||||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
|
||||
&sta->sta, tid, NULL);
|
||||
if (ret)
|
||||
printk(KERN_DEBUG "HW problem - can not stop rx "
|
||||
"aggregation for tid %d\n", tid);
|
||||
|
||||
/* shutdown timer has not expired */
|
||||
if (initiator != WLAN_BACK_TIMER)
|
||||
del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
|
||||
|
||||
/* check if this is a self generated aggregation halt */
|
||||
if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
|
||||
ieee80211_send_delba(sdata, ra, tid, 0, reason);
|
||||
|
||||
/* free the reordering buffer */
|
||||
for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
|
||||
if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
|
||||
/* release the reordered frames */
|
||||
dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
|
||||
sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
|
||||
sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
|
||||
}
|
||||
}
|
||||
/* free resources */
|
||||
kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
|
||||
kfree(sta->ampdu_mlme.tid_rx[tid]);
|
||||
sta->ampdu_mlme.tid_rx[tid] = NULL;
|
||||
sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
|
||||
|
||||
rcu_read_unlock();
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* After sending add Block Ack request we activated a timer until
|
||||
* add Block Ack response will arrive from the recipient.
|
||||
* If this timer expires sta_addba_resp_timer_expired will be executed.
|
||||
*/
|
||||
static void sta_addba_resp_timer_expired(unsigned long data)
|
||||
{
|
||||
/* not an elegant detour, but there is no choice as the timer passes
|
||||
* only one argument, and both sta_info and TID are needed, so init
|
||||
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
||||
* array gives the sta through container_of */
|
||||
u16 tid = *(u8 *)data;
|
||||
struct sta_info *temp_sta = container_of((void *)data,
|
||||
struct sta_info, timer_to_tid[tid]);
|
||||
|
||||
struct ieee80211_local *local = temp_sta->local;
|
||||
struct ieee80211_hw *hw = &local->hw;
|
||||
struct sta_info *sta;
|
||||
u8 *state;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
sta = sta_info_get(local, temp_sta->sta.addr);
|
||||
if (!sta) {
|
||||
rcu_read_unlock();
|
||||
return;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
/* check if the TID waits for addBA response */
|
||||
spin_lock_bh(&sta->lock);
|
||||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||||
spin_unlock_bh(&sta->lock);
|
||||
*state = HT_AGG_STATE_IDLE;
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "timer expired on tid %d but we are not "
|
||||
"expecting addBA response there", tid);
|
||||
#endif
|
||||
goto timer_expired_exit;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
|
||||
#endif
|
||||
|
||||
/* go through the state check in stop_BA_session */
|
||||
*state = HT_AGG_STATE_OPERATIONAL;
|
||||
spin_unlock_bh(&sta->lock);
|
||||
ieee80211_stop_tx_ba_session(hw, temp_sta->sta.addr, tid,
|
||||
WLAN_BACK_INITIATOR);
|
||||
|
||||
timer_expired_exit:
|
||||
rcu_read_unlock();
|
||||
}
|
||||
|
||||
void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
|
||||
{
|
||||
struct ieee80211_local *local = sdata->local;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < STA_TID_NUM; i++) {
|
||||
ieee80211_stop_tx_ba_session(&local->hw, addr, i,
|
||||
WLAN_BACK_INITIATOR);
|
||||
ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
|
||||
WLAN_BACK_RECIPIENT,
|
||||
WLAN_REASON_QSTA_LEAVE_QBSS);
|
||||
}
|
||||
}
|
||||
|
||||
int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
|
||||
{
|
||||
struct ieee80211_local *local = hw_to_local(hw);
|
||||
struct sta_info *sta;
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
u16 start_seq_num;
|
||||
u8 *state;
|
||||
int ret = 0;
|
||||
|
||||
if ((tid >= STA_TID_NUM) || !(hw->flags & IEEE80211_HW_AMPDU_AGGREGATION))
|
||||
return -EINVAL;
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Open BA session requested for %pM tid %u\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 the station\n");
|
||||
#endif
|
||||
ret = -ENOENT;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
spin_lock_bh(&sta->lock);
|
||||
|
||||
/* we have tried too many times, receiver does not want A-MPDU */
|
||||
if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
|
||||
ret = -EBUSY;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
/* check if the TID is not in aggregation flow already */
|
||||
if (*state != HT_AGG_STATE_IDLE) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - session is not "
|
||||
"idle on tid %u\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
ret = -EAGAIN;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
|
||||
/* prepare A-MPDU MLME for Tx aggregation */
|
||||
sta->ampdu_mlme.tid_tx[tid] =
|
||||
kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
|
||||
if (!sta->ampdu_mlme.tid_tx[tid]) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
|
||||
tid);
|
||||
#endif
|
||||
ret = -ENOMEM;
|
||||
goto err_unlock_sta;
|
||||
}
|
||||
/* Tx timer */
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
|
||||
sta_addba_resp_timer_expired;
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
|
||||
(unsigned long)&sta->timer_to_tid[tid];
|
||||
init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||||
|
||||
if (hw->ampdu_queues) {
|
||||
/* create a new queue for this aggregation */
|
||||
ret = ieee80211_ht_agg_queue_add(local, sta, tid);
|
||||
|
||||
/* case no queue is available to aggregation
|
||||
* don't switch to aggregation */
|
||||
if (ret) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - "
|
||||
"queue unavailable for tid %d\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
goto err_unlock_queue;
|
||||
}
|
||||
}
|
||||
sdata = sta->sdata;
|
||||
|
||||
/* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
|
||||
* call back right away, it must see that the flow has begun */
|
||||
*state |= HT_ADDBA_REQUESTED_MSK;
|
||||
|
||||
/* This is slightly racy because the queue isn't stopped */
|
||||
start_seq_num = sta->tid_seq[tid];
|
||||
|
||||
if (local->ops->ampdu_action)
|
||||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
|
||||
&sta->sta, tid, &start_seq_num);
|
||||
|
||||
if (ret) {
|
||||
/* No need to requeue the packets in the agg queue, since we
|
||||
* held the tx lock: no packet could be enqueued to the newly
|
||||
* allocated queue */
|
||||
if (hw->ampdu_queues)
|
||||
ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "BA request denied - HW unavailable for"
|
||||
" tid %d\n", tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
*state = HT_AGG_STATE_IDLE;
|
||||
goto err_unlock_queue;
|
||||
}
|
||||
|
||||
/* Will put all the packets in the new SW queue */
|
||||
if (hw->ampdu_queues)
|
||||
ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
|
||||
spin_unlock_bh(&sta->lock);
|
||||
|
||||
/* send an addBA request */
|
||||
sta->ampdu_mlme.dialog_token_allocator++;
|
||||
sta->ampdu_mlme.tid_tx[tid]->dialog_token =
|
||||
sta->ampdu_mlme.dialog_token_allocator;
|
||||
sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
|
||||
|
||||
|
||||
ieee80211_send_addba_request(sta->sdata, ra, tid,
|
||||
sta->ampdu_mlme.tid_tx[tid]->dialog_token,
|
||||
sta->ampdu_mlme.tid_tx[tid]->ssn,
|
||||
0x40, 5000);
|
||||
/* activate the timer for the recipient's addBA response */
|
||||
sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
|
||||
jiffies + ADDBA_RESP_INTERVAL;
|
||||
add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
|
||||
#endif
|
||||
goto exit;
|
||||
|
||||
err_unlock_queue:
|
||||
kfree(sta->ampdu_mlme.tid_tx[tid]);
|
||||
sta->ampdu_mlme.tid_tx[tid] = NULL;
|
||||
ret = -EBUSY;
|
||||
err_unlock_sta:
|
||||
spin_unlock_bh(&sta->lock);
|
||||
exit:
|
||||
rcu_read_unlock();
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
|
||||
|
||||
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_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 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;
|
||||
}
|
||||
|
||||
rcu_read_lock();
|
||||
sta = sta_info_get(local, ra);
|
||||
if (!sta) {
|
||||
rcu_read_unlock();
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Could not find station: %pM\n", ra);
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
state = &sta->ampdu_mlme.tid_state_tx[tid];
|
||||
spin_lock_bh(&sta->lock);
|
||||
|
||||
if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
|
||||
#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;
|
||||
}
|
||||
|
||||
WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
|
||||
|
||||
*state |= HT_ADDBA_DRV_READY_MSK;
|
||||
|
||||
if (*state == HT_AGG_STATE_OPERATIONAL) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
|
||||
#endif
|
||||
if (hw->ampdu_queues)
|
||||
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);
|
||||
|
||||
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);
|
||||
|
||||
/*
|
||||
* After accepting the AddBA Request we activated a timer,
|
||||
* resetting it after each frame that arrives from the originator.
|
||||
* if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
|
||||
*/
|
||||
static void sta_rx_agg_session_timer_expired(unsigned long data)
|
||||
{
|
||||
/* not an elegant detour, but there is no choice as the timer passes
|
||||
* only one argument, and various sta_info are needed here, so init
|
||||
* flow in sta_info_create gives the TID as data, while the timer_to_id
|
||||
* array gives the sta through container_of */
|
||||
u8 *ptid = (u8 *)data;
|
||||
u8 *timer_to_id = ptid - *ptid;
|
||||
struct sta_info *sta = container_of(timer_to_id, struct sta_info,
|
||||
timer_to_tid[0]);
|
||||
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
|
||||
#endif
|
||||
ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
|
||||
(u16)*ptid, WLAN_BACK_TIMER,
|
||||
WLAN_REASON_QSTA_TIMEOUT);
|
||||
}
|
||||
|
||||
void ieee80211_process_addba_request(struct ieee80211_local *local,
|
||||
struct sta_info *sta,
|
||||
struct ieee80211_mgmt *mgmt,
|
||||
size_t len)
|
||||
{
|
||||
struct ieee80211_hw *hw = &local->hw;
|
||||
struct ieee80211_conf *conf = &hw->conf;
|
||||
struct tid_ampdu_rx *tid_agg_rx;
|
||||
u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
|
||||
u8 dialog_token;
|
||||
int ret = -EOPNOTSUPP;
|
||||
|
||||
/* extract session parameters from addba request frame */
|
||||
dialog_token = mgmt->u.action.u.addba_req.dialog_token;
|
||||
timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
|
||||
start_seq_num =
|
||||
le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
|
||||
|
||||
capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
|
||||
ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
|
||||
tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
|
||||
buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
|
||||
|
||||
status = WLAN_STATUS_REQUEST_DECLINED;
|
||||
|
||||
/* sanity check for incoming parameters:
|
||||
* check if configuration can support the BA policy
|
||||
* and if buffer size does not exceeds max value */
|
||||
/* XXX: check own ht delayed BA capability?? */
|
||||
if (((ba_policy != 1)
|
||||
&& (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA)))
|
||||
|| (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
|
||||
status = WLAN_STATUS_INVALID_QOS_PARAM;
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_DEBUG "AddBA Req with bad params from "
|
||||
"%pM on tid %u. policy %d, buffer size %d\n",
|
||||
mgmt->sa, tid, ba_policy,
|
||||
buf_size);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
goto end_no_lock;
|
||||
}
|
||||
/* determine default buffer size */
|
||||
if (buf_size == 0) {
|
||||
struct ieee80211_supported_band *sband;
|
||||
|
||||
sband = local->hw.wiphy->bands[conf->channel->band];
|
||||
buf_size = IEEE80211_MIN_AMPDU_BUF;
|
||||
buf_size = buf_size << sband->ht_cap.ampdu_factor;
|
||||
}
|
||||
|
||||
|
||||
/* examine state machine */
|
||||
spin_lock_bh(&sta->lock);
|
||||
|
||||
if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_DEBUG "unexpected AddBA Req from "
|
||||
"%pM on tid %u\n",
|
||||
mgmt->sa, tid);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
goto end;
|
||||
}
|
||||
|
||||
/* prepare A-MPDU MLME for Rx aggregation */
|
||||
sta->ampdu_mlme.tid_rx[tid] =
|
||||
kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
|
||||
if (!sta->ampdu_mlme.tid_rx[tid]) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
|
||||
tid);
|
||||
#endif
|
||||
goto end;
|
||||
}
|
||||
/* rx timer */
|
||||
sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
|
||||
sta_rx_agg_session_timer_expired;
|
||||
sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
|
||||
(unsigned long)&sta->timer_to_tid[tid];
|
||||
init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
|
||||
|
||||
tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
|
||||
|
||||
/* prepare reordering buffer */
|
||||
tid_agg_rx->reorder_buf =
|
||||
kcalloc(buf_size, sizeof(struct sk_buff *), GFP_ATOMIC);
|
||||
if (!tid_agg_rx->reorder_buf) {
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
if (net_ratelimit())
|
||||
printk(KERN_ERR "can not allocate reordering buffer "
|
||||
"to tid %d\n", tid);
|
||||
#endif
|
||||
kfree(sta->ampdu_mlme.tid_rx[tid]);
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (local->ops->ampdu_action)
|
||||
ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
|
||||
&sta->sta, tid, &start_seq_num);
|
||||
#ifdef CONFIG_MAC80211_HT_DEBUG
|
||||
printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
|
||||
#endif /* CONFIG_MAC80211_HT_DEBUG */
|
||||
|
||||
if (ret) {
|
||||
kfree(tid_agg_rx->reorder_buf);
|
||||
kfree(tid_agg_rx);
|
||||
sta->ampdu_mlme.tid_rx[tid] = NULL;
|
||||
goto end;
|
||||
}
|
||||
|
||||
/* change state and send addba resp */
|
||||
sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
|
||||
tid_agg_rx->dialog_token = dialog_token;
|
||||
tid_agg_rx->ssn = start_seq_num;
|
||||
tid_agg_rx->head_seq_num = start_seq_num;
|
||||
tid_agg_rx->buf_size = buf_size;
|
||||
tid_agg_rx->timeout = timeout;
|
||||
tid_agg_rx->stored_mpdu_num = 0;
|
||||
status = WLAN_STATUS_SUCCESS;
|
||||
end:
|
||||
spin_unlock_bh(&sta->lock);
|
||||
|
||||
end_no_lock:
|
||||
ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
|
||||
dialog_token, status, 1, buf_size, timeout);
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
|
||||
struct sta_info *sta,
|
||||
struct ieee80211_mgmt *mgmt, size_t len)
|
||||
|
@ -987,6 +987,9 @@ u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
|
||||
struct ieee80211_ht_info *hti,
|
||||
u16 ap_ht_cap_flags);
|
||||
void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
|
||||
void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
|
||||
const u8 *da, u16 tid,
|
||||
u16 initiator, u16 reason_code);
|
||||
|
||||
void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
|
||||
u16 tid, u16 initiator, u16 reason);
|
||||
|
Loading…
Reference in New Issue
Block a user