mac80211: make PID rate control algorithm the default

[powerpc.git] / net / mac80211 / ieee80211_rate.c

diff --git a/net/mac80211/ieee80211_rate.c b/net/mac80211/ieee80211_rate.c
index 3260a4a..65fc9ad 100644 (file)
--- a/net/mac80211/ieee80211_rate.c
+++ b/net/mac80211/ieee80211_rate.c
@@ -21,6 +21,11 @@ struct rate_control_alg {
 static LIST_HEAD(rate_ctrl_algs);
 static DEFINE_MUTEX(rate_ctrl_mutex);
 
+static char *ieee80211_default_rc_algo = CONFIG_MAC80211_RC_DEFAULT;
+module_param(ieee80211_default_rc_algo, charp, 0644);
+MODULE_PARM_DESC(ieee80211_default_rc_algo,
+                "Default rate control algorithm for mac80211 to use");
+
 int ieee80211_rate_control_register(struct rate_control_ops *ops)
 {
        struct rate_control_alg *alg;
@@ -60,11 +65,11 @@ void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
        list_for_each_entry(alg, &rate_ctrl_algs, list) {
                if (alg->ops == ops) {
                        list_del(&alg->list);
+                       kfree(alg);
                        break;
                }
        }
        mutex_unlock(&rate_ctrl_mutex);
-       kfree(alg);
 }
 EXPORT_SYMBOL(ieee80211_rate_control_unregister);
 
@@ -89,21 +94,27 @@ ieee80211_try_rate_control_ops_get(const char *name)
        return ops;
 }
 
-/* Get the rate control algorithm. If `name' is NULL, get the first
- * available algorithm. */
+/* Get the rate control algorithm. */
 static struct rate_control_ops *
 ieee80211_rate_control_ops_get(const char *name)
 {
        struct rate_control_ops *ops;
+       const char *alg_name;
 
        if (!name)
-               name = "simple";
+               alg_name = ieee80211_default_rc_algo;
+       else
+               alg_name = name;
 
-       ops = ieee80211_try_rate_control_ops_get(name);
+       ops = ieee80211_try_rate_control_ops_get(alg_name);
        if (!ops) {
-               request_module("rc80211_%s", name);
-               ops = ieee80211_try_rate_control_ops_get(name);
+               request_module("rc80211_%s", alg_name);
+               ops = ieee80211_try_rate_control_ops_get(alg_name);
        }
+       if (!ops && name)
+               /* try default if specific alg requested but not found */
+               ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
+
        return ops;
 }
 
@@ -147,6 +158,53 @@ static void rate_control_release(struct kref *kref)
        kfree(ctrl_ref);
 }
 
+void rate_control_get_rate(struct net_device *dev,
+                          struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+                          struct rate_selection *sel)
+{
+       struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+       struct rate_control_ref *ref = local->rate_ctrl;
+       struct ieee80211_sub_if_data *sdata;
+       struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+       struct sta_info *sta = sta_info_get(local, hdr->addr1);
+       int i;
+       u16 fc;
+
+       memset(sel, 0, sizeof(struct rate_selection));
+
+       /* Send management frames and broadcast/multicast data using lowest
+        * rate. */
+       fc = le16_to_cpu(hdr->frame_control);
+       if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA ||
+           is_multicast_ether_addr(hdr->addr1))
+               sel->rate = rate_lowest(local, mode, sta);
+
+       /* If a forced rate is in effect, select it. */
+       sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+       if (sdata->bss && sdata->bss->force_unicast_rateidx > -1)
+               sel->rate = &mode->rates[sdata->bss->force_unicast_rateidx];
+
+       /* If we haven't found the rate yet, ask the rate control algo. */
+       if (!sel->rate)
+               ref->ops->get_rate(ref->priv, dev, mode, skb, sel);
+
+       /* Select a non-ERP backup rate. */
+       if (!sel->nonerp) {
+               for (i = 0; i < mode->num_rates - 1; i++) {
+                       struct ieee80211_rate *rate = &mode->rates[i];
+                       if (sel->rate->rate < rate->rate)
+                               break;
+
+                       if (rate_supported(sta, mode, i) &&
+                           !(rate->flags & IEEE80211_RATE_ERP))
+                               sel->nonerp = rate;
+               }
+       }
+
+       if (sta)
+               sta_info_put(sta);
+}
+
 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref)
 {
        kref_get(&ref->kref);
@@ -197,3 +255,4 @@ void rate_control_deinitialize(struct ieee80211_local *local)
        local->rate_ctrl = NULL;
        rate_control_put(ref);
 }
+