xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ath9k: add dynamic ACK timeout estimation

Browse Source 
Add dynamic ACK timeout estimation algorithm based on ACK frame RX timestamp,
TX frame timestamp and frame duration.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Tested-by: Philippe Duchein <wireless-dev@duchein.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Lorenzo Bianconi
2014-09-16 02:13:09 +02:00
committed by John W. Linville
parent 36678b2b67
commit c774d57fd4
6 changed files with 464 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
drivers/net/wireless/ath/ath9k/dynack.h Normal file
View File

@@ -0,0 +1,103 @@
/*
* Copyright (c) 2014, Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
*
* 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.
*/
#ifndef DYNACK_H
#define DYNACK_H
#define ATH_DYN_BUF 64
struct ath_hw;
struct ath_node;
/**
* struct ath_dyn_rxbuf - ACK frame ring buffer
* @h_rb: ring buffer head
* @t_rb: ring buffer tail
* @tstamp: ACK RX timestamp buffer
*/
struct ath_dyn_rxbuf {
u16 h_rb, t_rb;
u32 tstamp[ATH_DYN_BUF];
};
struct ts_info {
u32 tstamp;
u32 dur;
};
struct haddr_pair {
u8 h_dest[ETH_ALEN];
u8 h_src[ETH_ALEN];
};
/**
* struct ath_dyn_txbuf - tx frame ring buffer
* @h_rb: ring buffer head
* @t_rb: ring buffer tail
* @addr: dest/src address pair for a given TX frame
* @ts: TX frame timestamp buffer
*/
struct ath_dyn_txbuf {
u16 h_rb, t_rb;
struct haddr_pair addr[ATH_DYN_BUF];
struct ts_info ts[ATH_DYN_BUF];
};
/**
* struct ath_dynack - dynack processing info
* @enabled: enable dyn ack processing
* @ackto: current ACK timeout
* @lto: last ACK timeout computation
* @nodes: ath_node linked list
* @qlock: ts queue spinlock
* @ack_rbf: ACK ts ring buffer
* @st_rbf: status ts ring buffer
*/
struct ath_dynack {
bool enabled;
int ackto;
unsigned long lto;
struct list_head nodes;
/* protect timestamp queue access */
spinlock_t qlock;
struct ath_dyn_rxbuf ack_rbf;
struct ath_dyn_txbuf st_rbf;
};
#if defined(CONFIG_ATH9K_DYNACK)
void ath_dynack_reset(struct ath_hw *ah);
void ath_dynack_node_init(struct ath_hw *ah, struct ath_node *an);
void ath_dynack_node_deinit(struct ath_hw *ah, struct ath_node *an);
void ath_dynack_init(struct ath_hw *ah);
void ath_dynack_sample_ack_ts(struct ath_hw *ah, struct sk_buff *skb, u32 ts);
void ath_dynack_sample_tx_ts(struct ath_hw *ah, struct sk_buff *skb,
struct ath_tx_status *ts);
#else
static inline void ath_dynack_init(struct ath_hw *ah) {}
static inline void ath_dynack_node_init(struct ath_hw *ah,
struct ath_node *an) {}
static inline void ath_dynack_node_deinit(struct ath_hw *ah,
struct ath_node *an) {}
static inline void ath_dynack_sample_ack_ts(struct ath_hw *ah,
struct sk_buff *skb, u32 ts) {}
static inline void ath_dynack_sample_tx_ts(struct ath_hw *ah,
struct sk_buff *skb,
struct ath_tx_status *ts) {}
#endif
#endif /* DYNACK_H */