/*
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* Copyright (c) 2014, Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef DYNACK_H
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#define DYNACK_H
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#define ATH_DYN_BUF 64
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struct ath_hw;
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struct ath_node;
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/**
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* struct ath_dyn_rxbuf - ACK frame ring buffer
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* @h_rb: ring buffer head
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* @t_rb: ring buffer tail
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* @tstamp: ACK RX timestamp buffer
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*/
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struct ath_dyn_rxbuf {
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u16 h_rb, t_rb;
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u32 tstamp[ATH_DYN_BUF];
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};
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struct ts_info {
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u32 tstamp;
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u32 dur;
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};
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struct haddr_pair {
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u8 h_dest[ETH_ALEN];
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u8 h_src[ETH_ALEN];
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};
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/**
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* struct ath_dyn_txbuf - tx frame ring buffer
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* @h_rb: ring buffer head
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* @t_rb: ring buffer tail
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* @addr: dest/src address pair for a given TX frame
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* @ts: TX frame timestamp buffer
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*/
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struct ath_dyn_txbuf {
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u16 h_rb, t_rb;
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struct haddr_pair addr[ATH_DYN_BUF];
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struct ts_info ts[ATH_DYN_BUF];
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};
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/**
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* struct ath_dynack - dynack processing info
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* @enabled: enable dyn ack processing
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* @ackto: current ACK timeout
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* @lto: last ACK timeout computation
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* @nodes: ath_node linked list
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* @qlock: ts queue spinlock
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* @ack_rbf: ACK ts ring buffer
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* @st_rbf: status ts ring buffer
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*/
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struct ath_dynack {
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bool enabled;
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int ackto;
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unsigned long lto;
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struct list_head nodes;
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/* protect timestamp queue access */
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spinlock_t qlock;
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struct ath_dyn_rxbuf ack_rbf;
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struct ath_dyn_txbuf st_rbf;
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};
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#if defined(CONFIG_ATH9K_DYNACK)
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void ath_dynack_reset(struct ath_hw *ah);
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void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an);
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void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an);
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void ath_dynack_init(struct ath_hw *ah);
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void ath_dynack_sample_ack_ts(struct ath_hw *ah, struct sk_buff *skb, u32 ts);
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void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb,
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struct ath_tx_status *ts,
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struct ieee80211_sta *sta);
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#else
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static inline void ath_dynack_init(struct ath_hw *ah) {}
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static inline void ath_dynack_node_init(struct ath_hw *ah,
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struct ath_node *an) {}
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static inline void ath_dynack_node_deinit(struct ath_hw *ah,
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struct ath_node *an) {}
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static inline void ath_dynack_sample_ack_ts(struct ath_hw *ah,
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struct sk_buff *skb, u32 ts) {}
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static inline void ath_dynack_sample_tx_ts(struct ath_hw *ah,
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struct sk_buff *skb,
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struct ath_tx_status *ts,
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struct ieee80211_sta *sta) {}
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#endif
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#endif /* DYNACK_H */
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