diff options
Diffstat (limited to 'net/mac80211/util.c')
| -rw-r--r-- | net/mac80211/util.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 0d85a382746f..32f1bc5908c5 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -3913,10 +3913,8 @@ int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, } EXPORT_SYMBOL(ieee80211_parse_p2p_noa); -void ieee80211_recalc_dtim(struct ieee80211_local *local, - struct ieee80211_sub_if_data *sdata) +void ieee80211_recalc_dtim(struct ieee80211_sub_if_data *sdata, u64 tsf) { - u64 tsf = drv_get_tsf(local, sdata); u64 dtim_count = 0; u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; u8 dtim_period = sdata->vif.bss_conf.dtim_period; @@ -3954,6 +3952,33 @@ void ieee80211_recalc_dtim(struct ieee80211_local *local, ps->dtim_count = dtim_count; } +/* + * Given a long beacon period, calculate the current index into + * that period to determine the number of TSBTTs until the next TBTT. + * It is completely valid to have a short beacon period that differs + * from the dtim period (i.e a TBTT thats not a DTIM). + */ +void ieee80211_recalc_sb_count(struct ieee80211_sub_if_data *sdata, u64 tsf) +{ + u32 sb_idx; + struct ps_data *ps = &sdata->bss->ps; + u8 lb_period = sdata->vif.bss_conf.s1g_long_beacon_period; + u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; + + /* No mesh / IBSS support for short beaconing */ + if (tsf == -1ULL || !lb_period || + (sdata->vif.type != NL80211_IFTYPE_AP && + sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) + return; + + /* find the current TSBTT index in our lb_period */ + do_div(tsf, beacon_int); + sb_idx = do_div(tsf, lb_period); + + /* num TSBTTs until the next TBTT */ + ps->sb_count = sb_idx ? lb_period - sb_idx : 0; +} + static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, struct ieee80211_chanctx *ctx) { |