mac80211: set default QoS values according to spec

We've never really cared about the default QoS (WMM) values, but
we really should if the AP doesn't send any. This patch makes
mac80211 use the default values according to 802.11-2007, and
additionally syncs the default values when we disassociate so
whatever the last AP said gets "unconfigured".

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 75c487229f2effa75567b94092c2306cb963eaf1..c5445bae9d6cacd54486100124326f9bdb9f1c8e 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1043,6 +1043,8 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
        rcu_read_unlock();
 
+       ieee80211_set_wmm_default(sdata);
+
        ieee80211_recalc_idle(local);
 
        /* channel(_type) changes are handled by ieee80211_hw_config */
@@ -1658,6 +1660,8 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
        if (elems.wmm_param)
                ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
                                         elems.wmm_param_len);
+       else
+               ieee80211_set_wmm_default(sdata);
 
        if (elems.ht_info_elem && elems.wmm_param &&
            (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) &&

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 97b613affe080cd33c75c7aa724bd35409711538..0689a8fbd1e63f58aa829cadeb2dd9019c96c4f8 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -708,26 +708,62 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
 {
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_tx_queue_params qparam;
-       int i;
+       int queue;
+       bool use_11b;
+       int aCWmin, aCWmax;
 
        if (!local->ops->conf_tx)
                return;
 
        memset(&qparam, 0, sizeof(qparam));
 
-       qparam.aifs = 2;
-
-       if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
-           !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
-               qparam.cw_min = 31;
-       else
-               qparam.cw_min = 15;
+       use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
+                !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
 
-       qparam.cw_max = 1023;
-       qparam.txop = 0;
+       for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
+               /* Set defaults according to 802.11-2007 Table 7-37 */
+               aCWmax = 1023;
+               if (use_11b)
+                       aCWmin = 31;
+               else
+                       aCWmin = 15;
+
+               switch (queue) {
+               case 3: /* AC_BK */
+                       qparam.cw_max = aCWmin;
+                       qparam.cw_min = aCWmax;
+                       qparam.txop = 0;
+                       qparam.aifs = 7;
+                       break;
+               default: /* never happens but let's not leave undefined */
+               case 2: /* AC_BE */
+                       qparam.cw_max = aCWmin;
+                       qparam.cw_min = aCWmax;
+                       qparam.txop = 0;
+                       qparam.aifs = 3;
+                       break;
+               case 1: /* AC_VI */
+                       qparam.cw_max = aCWmin;
+                       qparam.cw_min = (aCWmin + 1) / 2 - 1;
+                       if (use_11b)
+                               qparam.txop = 6016/32;
+                       else
+                               qparam.txop = 3008/32;
+                       qparam.aifs = 2;
+                       break;
+               case 0: /* AC_VO */
+                       qparam.cw_max = (aCWmin + 1) / 2 - 1;
+                       qparam.cw_min = (aCWmin + 1) / 4 - 1;
+                       if (use_11b)
+                               qparam.txop = 3264/32;
+                       else
+                               qparam.txop = 1504/32;
+                       qparam.aifs = 2;
+                       break;
+               }
 
-       for (i = 0; i < local_to_hw(local)->queues; i++)
-               drv_conf_tx(local, i, &qparam);
+               drv_conf_tx(local, queue, &qparam);
+       }
 }
 
 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,