mac80211: track AP's beacon rate and give it to the driver
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 <alexander.bondar@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index a405a7a..5b7a3da 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -305,6 +305,7 @@
* @basic_rates: bitmap of basic rates, each bit stands for an
* index into the rate table configured by the driver in
* the current band.
+ * @beacon_rate: associated AP's beacon TX rate
* @mcast_rate: per-band multicast rate index + 1 (0: disabled)
* @bssid: The BSSID for this BSS
* @enable_beacon: whether beaconing should be enabled or not
@@ -352,6 +353,7 @@
u32 sync_device_ts;
u8 sync_dtim_count;
u32 basic_rates;
+ struct ieee80211_rate *beacon_rate;
int mcast_rate[IEEE80211_NUM_BANDS];
u16 ht_operation_mode;
s32 cqm_rssi_thold;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 7a6f1a0..a4dfb0b 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -94,6 +94,7 @@
#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
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index ad9bb9e..87f2d4d 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1779,8 +1779,10 @@
* 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 @@
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 @@
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))
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 99b10392..1b122a7 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -140,6 +140,15 @@
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;
}