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 struct ieee80211_sta *sta);
91 #else
92 static inline void ath_dynack_init(struct ath_hw *ah) {}
93 static inline void ath_dynack_node_init(struct ath_hw *ah,
94 struct ath_node *an) {}
95 static inline void ath_dynack_node_deinit(struct ath_hw *ah,
96 struct ath_node *an) {}
97 static inline void ath_dynack_sample_ack_ts(struct ath_hw *ah,
98 struct sk_buff *skb, u32 ts) {}
99 static inline void ath_dynack_sample_tx_ts(struct ath_hw *ah,
100 struct sk_buff *skb,
101 struct ath_tx_status *ts,
102 struct ieee80211_sta *sta) {}
103 #endif
104
105 #endif /* DYNACK_H */