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mac80211: add multi-rate retry support

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This patch adjusts the rate control API to allow multi-rate retry
if supported by the driver. The ieee80211_hw struct specifies how
many alternate rate selections the driver supports.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2008-10-05 18:04:24 +02:00 • committed by John W. Linville
parent 76708dee38
commit 870abdf671
7 changed files with 39 additions and 14 deletions
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29
include/net/mac80211.h
View file

@ -292,6 +292,20 @@ enum mac80211_tx_control_flags {
#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
(IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
/* maximum number of alternate rate retry stages */
#define IEEE80211_TX_MAX_ALTRATE 3
/**
* struct ieee80211_tx_altrate - alternate rate selection/status
*
* @rate_idx: rate index to attempt to send with
* @limit: number of retries before fallback
*/
struct ieee80211_tx_altrate {
s8 rate_idx;
u8 limit;
};
/**
* struct ieee80211_tx_info - skb transmit information
*
@ -335,12 +349,14 @@ struct ieee80211_tx_info {
struct ieee80211_key_conf *hw_key;
struct ieee80211_sta *sta;
unsigned long jiffies;
s8 rts_cts_rate_idx, alt_retry_rate_idx;
s8 rts_cts_rate_idx;
u8 retry_limit;
struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
} control;
struct {
u64 ampdu_ack_map;
int ack_signal;
struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
u8 retry_count;
bool excessive_retries;
u8 ampdu_ack_len;
@ -828,6 +844,9 @@ enum ieee80211_hw_flags {
* within &struct ieee80211_vif.
* @sta_data_size: size (in bytes) of the drv_priv data area
* within &struct ieee80211_sta.
*
* @max_altrates: maximum number of alternate rate retry stages
* @max_altrate_tries: maximum number of tries for each stage
*/
struct ieee80211_hw {
struct ieee80211_conf conf;
@ -844,6 +863,8 @@ struct ieee80211_hw {
u16 ampdu_queues;
u16 max_listen_interval;
s8 max_signal;
u8 max_altrates;
u8 max_altrate_tries;
};
struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
@ -900,11 +921,11 @@ ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
static inline struct ieee80211_rate *
ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
const struct ieee80211_tx_info *c)
const struct ieee80211_tx_info *c, int idx)
{
if (c->control.alt_retry_rate_idx < 0)
if (c->control.retries[idx].rate_idx < 0)
return NULL;
return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx];
return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
}
/**