linux/drivers/net/wireless/ath/ath9k/dynack.c

/*
 * Copyright (c) 2014, Lorenzo Bianconi <[email protected]>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "ath9k.h"
#include "hw.h"
#include "dynack.h"

#define COMPUTE_TO …
#define LATEACK_DELAY …
#define EWMA_LEVEL …
#define EWMA_DIV …

/**
 * ath_dynack_get_max_to - set max timeout according to channel width
 * @ah: ath hw
 *
 */
static u32 ath_dynack_get_max_to(struct ath_hw *ah)
{ … }

/*
 * ath_dynack_ewma - EWMA (Exponentially Weighted Moving Average) calculation
 */
static inline int ath_dynack_ewma(int old, int new)
{ … }

/**
 * ath_dynack_get_sifs - get sifs time based on phy used
 * @ah: ath hw
 * @phy: phy used
 *
 */
static inline u32 ath_dynack_get_sifs(struct ath_hw *ah, int phy)
{ … }

/**
 * ath_dynack_bssidmask - filter out ACK frames based on BSSID mask
 * @ah: ath hw
 * @mac: receiver address
 */
static inline bool ath_dynack_bssidmask(struct ath_hw *ah, const u8 *mac)
{ … }

/**
 * ath_dynack_set_timeout - configure timeouts/slottime registers
 * @ah: ath hw
 * @to: timeout value
 *
 */
static void ath_dynack_set_timeout(struct ath_hw *ah, int to)
{ … }

/**
 * ath_dynack_compute_ackto - compute ACK timeout as the maximum STA timeout
 * @ah: ath hw
 *
 * should be called while holding qlock
 */
static void ath_dynack_compute_ackto(struct ath_hw *ah)
{ … }

/**
 * ath_dynack_compute_to - compute STA ACK timeout
 * @ah: ath hw
 *
 * should be called while holding qlock
 */
static void ath_dynack_compute_to(struct ath_hw *ah)
{ … }

/**
 * ath_dynack_sample_tx_ts - status timestamp sampling method
 * @ah: ath hw
 * @skb: socket buffer
 * @ts: tx status info
 * @sta: station pointer
 *
 */
void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb,
			     struct ath_tx_status *ts,
			     struct ieee80211_sta *sta)
{ … }
EXPORT_SYMBOL(…);

/**
 * ath_dynack_sample_ack_ts - ACK timestamp sampling method
 * @ah: ath hw
 * @skb: socket buffer
 * @ts: rx timestamp
 *
 */
void ath_dynack_sample_ack_ts(struct ath_hw *ah, struct sk_buff *skb,
			      u32 ts)
{ … }
EXPORT_SYMBOL(…);

/**
 * ath_dynack_node_init - init ath_node related info
 * @ah: ath hw
 * @an: ath node
 *
 */
void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an)
{ … }
EXPORT_SYMBOL(…);

/**
 * ath_dynack_node_deinit - deinit ath_node related info
 * @ah: ath hw
 * @an: ath node
 *
 */
void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an)
{ … }
EXPORT_SYMBOL(…);

/**
 * ath_dynack_reset - reset dynack processing
 * @ah: ath hw
 *
 */
void ath_dynack_reset(struct ath_hw *ah)
{ … }
EXPORT_SYMBOL(…);

/**
 * ath_dynack_init - init dynack data structure
 * @ah: ath hw
 *
 */
void ath_dynack_init(struct ath_hw *ah)
{ … }