1 /* 2 * Copyright (c) 2014, Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #ifndef DYNACK_H 18 #define DYNACK_H 19 20 #define ATH_DYN_BUF 64 21 22 struct ath_hw; 23 struct ath_node; 24 25 /** 26 * struct ath_dyn_rxbuf - ACK frame ring buffer 27 * @h_rb: ring buffer head 28 * @t_rb: ring buffer tail 29 * @tstamp: ACK RX timestamp buffer 30 */ 31 struct ath_dyn_rxbuf { 32 u16 h_rb, t_rb; 33 u32 tstamp[ATH_DYN_BUF]; 34 }; 35 36 struct ts_info { 37 u32 tstamp; 38 u32 dur; 39 }; 40 41 struct haddr_pair { 42 u8 h_dest[ETH_ALEN]; 43 u8 h_src[ETH_ALEN]; 44 }; 45 46 /** 47 * struct ath_dyn_txbuf - tx frame ring buffer 48 * @h_rb: ring buffer head 49 * @t_rb: ring buffer tail 50 * @addr: dest/src address pair for a given TX frame 51 * @ts: TX frame timestamp buffer 52 */ 53 struct ath_dyn_txbuf { 54 u16 h_rb, t_rb; 55 struct haddr_pair addr[ATH_DYN_BUF]; 56 struct ts_info ts[ATH_DYN_BUF]; 57 }; 58 59 /** 60 * struct ath_dynack - dynack processing info 61 * @enabled: enable dyn ack processing 62 * @ackto: current ACK timeout 63 * @lto: last ACK timeout computation 64 * @nodes: ath_node linked list 65 * @qlock: ts queue spinlock 66 * @ack_rbf: ACK ts ring buffer 67 * @st_rbf: status ts ring buffer 68 */ 69 struct ath_dynack { 70 bool enabled; 71 int ackto; 72 unsigned long lto; 73 74 struct list_head nodes; 75 76 /* protect timestamp queue access */ 77 spinlock_t qlock; 78 struct ath_dyn_rxbuf ack_rbf; 79 struct ath_dyn_txbuf st_rbf; 80 }; 81 82 #if defined(CONFIG_ATH9K_DYNACK) 83 void ath_dynack_reset(struct ath_hw *ah); 84 void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an); 85 void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an); 86 void ath_dynack_init(struct ath_hw *ah); 87 void ath_dynack_sample_ack_ts(struct ath_hw *ah, struct sk_buff *skb, u32 ts); 88 void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb, 89 struct ath_tx_status *ts); 90 #else 91 static inline void ath_dynack_init(struct ath_hw *ah) {} 92 static inline void ath_dynack_node_init(struct ath_hw *ah, 93 struct ath_node *an) {} 94 static inline void ath_dynack_node_deinit(struct ath_hw *ah, 95 struct ath_node *an) {} 96 static inline void ath_dynack_sample_ack_ts(struct ath_hw *ah, 97 struct sk_buff *skb, u32 ts) {} 98 static inline void ath_dynack_sample_tx_ts(struct ath_hw *ah, 99 struct sk_buff *skb, 100 struct ath_tx_status *ts) {} 101 #endif 102 103 #endif /* DYNACK_H */ 104