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mac80211: A-MPDU Tx add session's and low level driver's API
This patch adds the API for 3 stages in A-MPDU Tx session flow: - request mac80211 to start/stop A-MPDU Tx session for specific TID. such a request should be issued by a load aware element, either mac80211 itself or external element. - requests by mac80211 to low-level driver to start/stop Tx aggregation. notice that low level driver responds now with Starting Sequence Number. - async feedback by low-level to mac80211 to inform that HW is ready for next A-MPDU Tx state. Changes in API to Rx A-MPDU were also made, reflected in iwlwifi changes as well. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ron Rindjunsky
John W. Linville
parent
8816edcea9
commit
0df3ef45a3
@ -4732,7 +4732,7 @@ static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
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int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
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enum ieee80211_ampdu_mlme_action action,
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const u8 *addr, u16 tid, u16 ssn)
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const u8 *addr, u16 tid, u16 *ssn)
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{
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struct iwl4965_priv *priv = hw->priv;
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int sta_id;
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@ -4744,7 +4744,7 @@ int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
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switch (action) {
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case IEEE80211_AMPDU_RX_START:
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IWL_DEBUG_HT("start Rx\n");
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iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, ssn);
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iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
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break;
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case IEEE80211_AMPDU_RX_STOP:
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IWL_DEBUG_HT("stop Rx\n");
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@ -777,7 +777,7 @@ extern void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
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struct ieee80211_ht_info *sta_ht_inf);
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extern int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
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enum ieee80211_ampdu_mlme_action action,
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const u8 *addr, u16 tid, u16 ssn);
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const u8 *addr, u16 tid, u16 *ssn);
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#ifdef CONFIG_IWL4965_HT_AGG
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extern int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da,
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u16 tid, u16 *start_seq_num);
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@ -967,10 +967,14 @@ enum ieee80211_filter_flags {
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* &struct ieee80211_ops to indicate which action is needed.
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* @IEEE80211_AMPDU_RX_START: start Rx aggregation
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* @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
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* @IEEE80211_AMPDU_TX_START: start Tx aggregation
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* @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
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*/
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enum ieee80211_ampdu_mlme_action {
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IEEE80211_AMPDU_RX_START,
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IEEE80211_AMPDU_RX_STOP,
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IEEE80211_AMPDU_TX_START,
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IEEE80211_AMPDU_TX_STOP,
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};
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/**
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@ -1111,7 +1115,8 @@ enum ieee80211_ampdu_mlme_action {
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* The RA/TID combination determines the destination and TID we want
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* the ampdu action to be performed for. The action is defined through
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* ieee80211_ampdu_mlme_action. Starting sequence number (@ssn)
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* is the first frame we expect to perform the action on.
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* is the first frame we expect to perform the action on. notice
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* that TX/RX_STOP can pass NULL for this parameter.
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*/
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struct ieee80211_ops {
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int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
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@ -1162,7 +1167,7 @@ struct ieee80211_ops {
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int (*conf_ht)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
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int (*ampdu_action)(struct ieee80211_hw *hw,
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enum ieee80211_ampdu_mlme_action action,
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const u8 *ra, u16 tid, u16 ssn);
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const u8 *addr, u16 tid, u16 *ssn);
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};
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/**
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@ -1574,4 +1579,81 @@ void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif),
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void *data);
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/**
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* ieee80211_start_tx_ba_session - Start a tx Block Ack session.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient
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* @tid: the TID to BA on.
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* @return: success if addBA request was sent, failure otherwise
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*
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* Although mac80211/low level driver/user space application can estimate
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* the need to start aggregation on a certain RA/TID, the session level
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* will be managed by the mac80211.
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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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* ieee80211_start_tx_ba_cb - low level driver ready to aggregate.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient.
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* @tid: the TID to BA on.
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*
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* This function must be called by low level driver once it has
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* finished with preparations for the BA session.
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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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* ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient.
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* @tid: the TID to BA on.
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*
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* This function must be called by low level driver once it has
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* finished with preparations for the BA session.
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* This version of the function is irq safe.
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*/
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void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
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u16 tid);
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/**
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* ieee80211_stop_tx_ba_session - Stop a Block Ack session.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient
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* @tid: the TID to stop BA.
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* @initiator: if indicates initiator DELBA frame will be sent.
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* @return: error if no sta with matching da found, success otherwise
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*
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* Although mac80211/low level driver/user space application can estimate
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* the need to stop aggregation on a certain RA/TID, the session level
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* will be managed by the mac80211.
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*/
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int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
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u8 *ra, u16 tid,
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enum ieee80211_back_parties initiator);
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/**
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* ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient.
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* @tid: the desired TID to BA on.
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*
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* This function must be called by low level driver once it has
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* finished with preparations for the BA session tear down.
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*/
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void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid);
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/**
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* ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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* @ra: receiver address of the BA session recipient.
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* @tid: the desired TID to BA on.
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*
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* This function must be called by low level driver once it has
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* finished with preparations for the BA session tear down.
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* This version of the function is irq safe.
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*/
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void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
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u16 tid);
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#endif /* MAC80211_H */
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@ -1128,7 +1128,7 @@ static void ieee80211_sta_process_addba_request(struct net_device *dev,
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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->addr, tid, start_seq_num);
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sta->addr, tid, &start_seq_num);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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@ -1230,7 +1230,7 @@ void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
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BUG_ON(!local->ops->ampdu_action);
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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
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ra, tid, EINVAL);
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ra, 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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"aggergation for tid %d\n", tid);
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