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mac80211: track AP's beacon rate and give it to the driver

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Track the AP's beacon rate in the scan BSS data and in the
interface configuration to let the drivers know which rate
the AP is using. This information may be used by drivers,
in our case to let the firmware optimise beacon RX.

Signed-off-by: Alexander Bondar <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Alexander Bondar 2013-05-19 14:23:57 +03:00 • committed by Johannes Berg
commit 817cee7675
4 changed files with 19 additions and 1 deletions
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1
net/mac80211/ieee80211_i.h
View file

@ -94,6 +94,7 @@ struct ieee80211_bss {
#define IEEE80211_MAX_SUPP_RATES 32
u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
size_t supp_rates_len;
struct ieee80211_rate *beacon_rate;
/*
* During association, we save an ERP value from a probe response so

8
net/mac80211/mlme.c
View file

@ -1779,8 +1779,10 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
* probably just won't work at all.
*/
bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
bss_conf->beacon_rate = bss->beacon_rate;
bss_info_changed |= BSS_CHANGED_BEACON_INFO;
} else {
bss_conf->beacon_rate = NULL;
bss_conf->dtim_period = 0;
}
@ -1903,6 +1905,8 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
del_timer_sync(&sdata->u.mgd.chswitch_timer);
sdata->vif.bss_conf.dtim_period = 0;
sdata->vif.bss_conf.beacon_rate = NULL;
ifmgd->have_beacon = false;
ifmgd->flags = 0;
@ -2754,8 +2758,10 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
channel);
if (bss)
if (bss) {
ieee80211_rx_bss_put(local, bss);
sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
}
if (!sdata->u.mgd.associated ||
!ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))

9
net/mac80211/scan.c
View file

@ -140,6 +140,15 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
bss->valid_data |= IEEE80211_BSS_VALID_WMM;
}
if (beacon) {
struct ieee80211_supported_band *sband =
local->hw.wiphy->bands[rx_status->band];
if (!(rx_status->flag & RX_FLAG_HT) &&
!(rx_status->flag & RX_FLAG_VHT))
bss->beacon_rate =
&sband->bitrates[rx_status->rate_idx];
}
return bss;
}