LXR linux/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
  22struct ath_hw;
  23struct 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 */
  31struct ath_dyn_rxbuf {
  32        u16 h_rb, t_rb;
  33        u32 tstamp[ATH_DYN_BUF];
  34};
  35
  36struct ts_info {
  37        u32 tstamp;
  38        u32 dur;
  39};
  40
  41struct 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 */
  53struct 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 */
  69struct 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)
  83void ath_dynack_reset(struct ath_hw *ah);
  84void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an);
  85void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an);
  86void ath_dynack_init(struct ath_hw *ah);
  87void ath_dynack_sample_ack_ts(struct ath_hw *ah, struct sk_buff *skb, u32 ts);
  88void 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
  92static inline void ath_dynack_init(struct ath_hw *ah) {}
  93static inline void ath_dynack_node_init(struct ath_hw *ah,
  94                                        struct ath_node *an) {}
  95static inline void ath_dynack_node_deinit(struct ath_hw *ah,
  96                                          struct ath_node *an) {}
  97static inline void ath_dynack_sample_ack_ts(struct ath_hw *ah,
  98                                            struct sk_buff *skb, u32 ts) {}
  99static 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 */
 106