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mac80211: add helper for management / no-ack frame rate decision

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All current rate control algorithms agree to send management and no-ack
frames at the lowest rate. They also agree to do this when sta
and the private rate control data is NULL. We add a hlper to mac80211
for this and simplify the rate control algorithm code.

Developers wishing to make enhancements to rate control algorithms
are for broadcast/multicast can opt to not use this in their
gate_rate() mac80211 callback.

Cc: Zhu Yi <yi.zhu@intel.com>
Acked-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: ipw3945-devel@lists.sourceforge.net
Cc: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Cc: Derek Smithies <derek@indranet.co.nz>
Cc: Chittajit Mitra <Chittajit.Mitra@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez
2009-07-16 10:05:41 -07:00
committed by John W. Linville
parent 943ab70f6a
commit 4c6d4f5c33
7 changed files with 59 additions and 60 deletions
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14
drivers/net/wireless/ath/ath9k/rc.c
View File

@@ -1518,23 +1518,11 @@ exit:
static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
struct ieee80211_tx_rate_control *txrc)
{
struct ieee80211_supported_band *sband = txrc->sband;
struct sk_buff *skb = txrc->skb;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ath_softc *sc = priv;
struct ath_rate_priv *ath_rc_priv = priv_sta;
__le16 fc = hdr->frame_control;
/* lowest rate for management and NO_ACK frames */
if (!ieee80211_is_data(fc) ||
tx_info->flags & IEEE80211_TX_CTL_NO_ACK || !sta) {
tx_info->control.rates[0].idx = rate_lowest_index(sband, sta);
tx_info->control.rates[0].count =
(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) ?
1 : ATH_MGT_TXMAXTRY;
if (rate_control_send_low(sta, priv_sta, txrc))
return;
}
/* Find tx rate for unicast frames */
ath_rc_ratefind(sc, ath_rc_priv, txrc);