drivers/net/wireless/ath/ath9k/dynack.h

   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 */