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