cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dynack.h (3056B)

      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 */