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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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13
net/mac80211/tx.c
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@ -454,15 +454,16 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
if (unlikely(rsel.probe_idx >= 0)) {
info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
tx->flags |= IEEE80211_TX_PROBE_LAST_FRAG;
info->control.alt_retry_rate_idx = tx->rate_idx;
info->control.retries[0].rate_idx = tx->rate_idx;
info->control.retries[0].limit = tx->local->hw.max_altrate_tries;
tx->rate_idx = rsel.probe_idx;
} else
info->control.alt_retry_rate_idx = -1;
} else if (info->control.retries[0].limit == 0)
info->control.retries[0].rate_idx = -1;
if (unlikely(tx->rate_idx < 0))
return TX_DROP;
} else
info->control.alt_retry_rate_idx = -1;
info->control.retries[0].rate_idx = -1;
if (tx->sdata->bss_conf.use_cts_prot &&
(tx->flags & IEEE80211_TX_FRAGMENTED) && (rsel.nonerp_idx >= 0)) {
@ -521,7 +522,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
* frames.
* TODO: The last fragment could still use multiple retry
* rates. */
info->control.alt_retry_rate_idx = -1;
info->control.retries[0].rate_idx = -1;
}
/* Use CTS protection for unicast frames sent using extended rates if
@ -551,7 +552,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
int idx;
/* Do not use multiple retry rates when using RTS/CTS */
info->control.alt_retry_rate_idx = -1;
info->control.retries[0].rate_idx = -1;
/* Use min(data rate, max base rate) as CTS/RTS rate */
rate = &sband->bitrates[tx->rate_idx];