- Update to 2.6.25-rc3.

[linux-flexiantxendom0-3.2.10.git] / net / mac80211 / rc80211_simple.c

diff --git a/net/mac80211/rc80211_simple.c b/net/mac80211/rc80211_simple.c
index da72737..9a78b11 100644 (file)
--- a/net/mac80211/rc80211_simple.c
+++ b/net/mac80211/rc80211_simple.c
@@ -13,6 +13,7 @@
 #include <linux/slab.h>
 #include <linux/skbuff.h>
 #include <linux/compiler.h>
+#include <linux/module.h>
 
 #include <net/mac80211.h>
 #include "ieee80211_i.h"
@@ -23,6 +24,8 @@
 /* This is a minimal implementation of TX rate controlling that can be used
  * as the default when no improved mechanisms are available. */
 
+#define RATE_CONTROL_NUM_DOWN 20
+#define RATE_CONTROL_NUM_UP   15
 
 #define RATE_CONTROL_EMERG_DEC 2
 #define RATE_CONTROL_INTERVAL (HZ / 20)
@@ -87,26 +90,6 @@ static void rate_control_rate_dec(struct ieee80211_local *local,
        }
 }
 
-
-static struct ieee80211_rate *
-rate_control_lowest_rate(struct ieee80211_local *local,
-                        struct ieee80211_hw_mode *mode)
-{
-       int i;
-
-       for (i = 0; i < mode->num_rates; i++) {
-               struct ieee80211_rate *rate = &mode->rates[i];
-
-               if (rate->flags & IEEE80211_RATE_SUPPORTED)
-                       return rate;
-       }
-
-       printk(KERN_DEBUG "rate_control_lowest_rate - no supported rates "
-              "found\n");
-       return &mode->rates[0];
-}
-
-
 struct global_rate_control {
        int dummy;
 };
@@ -216,35 +199,33 @@ static void rate_control_simple_tx_status(void *priv, struct net_device *dev,
 }
 
 
-static struct ieee80211_rate *
+static void
 rate_control_simple_get_rate(void *priv, struct net_device *dev,
+                            struct ieee80211_hw_mode *mode,
                             struct sk_buff *skb,
-                            struct rate_control_extra *extra)
+                            struct rate_selection *sel)
 {
        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-       struct ieee80211_sub_if_data *sdata;
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
-       struct ieee80211_hw_mode *mode = extra->mode;
+       struct ieee80211_sub_if_data *sdata;
        struct sta_info *sta;
-       int rateidx, nonerp_idx;
+       int rateidx;
        u16 fc;
 
-       memset(extra, 0, sizeof(*extra));
+       sta = sta_info_get(local, hdr->addr1);
 
+       /* 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 ||
-           (hdr->addr1[0] & 0x01)) {
-               /* Send management frames and broadcast/multicast data using
-                * lowest rate. */
-               /* TODO: this could probably be improved.. */
-               return rate_control_lowest_rate(local, mode);
+           is_multicast_ether_addr(hdr->addr1) || !sta) {
+               sel->rate = rate_lowest(local, mode, sta);
+               if (sta)
+                       sta_info_put(sta);
+               return;
        }
 
-       sta = sta_info_get(local, hdr->addr1);
-
-       if (!sta)
-               return rate_control_lowest_rate(local, mode);
-
+       /* 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)
                sta->txrate = sdata->bss->force_unicast_rateidx;
@@ -255,17 +236,10 @@ rate_control_simple_get_rate(void *priv, struct net_device *dev,
                rateidx = mode->num_rates - 1;
 
        sta->last_txrate = rateidx;
-       nonerp_idx = rateidx;
-       while (nonerp_idx > 0 &&
-              ((mode->rates[nonerp_idx].flags & IEEE80211_RATE_ERP) ||
-               !(mode->rates[nonerp_idx].flags & IEEE80211_RATE_SUPPORTED) ||
-               !(sta->supp_rates & BIT(nonerp_idx))))
-               nonerp_idx--;
-       extra->nonerp = &mode->rates[nonerp_idx];
 
        sta_info_put(sta);
 
-       return &mode->rates[rateidx];
+       sel->rate = &mode->rates[rateidx];
 }
 
 
@@ -391,7 +365,7 @@ static void rate_control_simple_remove_sta_debugfs(void *priv, void *priv_sta)
 }
 #endif
 
-struct rate_control_ops mac80211_rcsimple = {
+static struct rate_control_ops mac80211_rcsimple = {
        .name = "simple",
        .tx_status = rate_control_simple_tx_status,
        .get_rate = rate_control_simple_get_rate,
@@ -406,3 +380,21 @@ struct rate_control_ops mac80211_rcsimple = {
        .remove_sta_debugfs = rate_control_simple_remove_sta_debugfs,
 #endif
 };
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Simple rate control algorithm");
+
+int __init rc80211_simple_init(void)
+{
+       return ieee80211_rate_control_register(&mac80211_rcsimple);
+}
+
+void rc80211_simple_exit(void)
+{
+       ieee80211_rate_control_unregister(&mac80211_rcsimple);
+}
+
+#ifdef CONFIG_MAC80211_RC_SIMPLE_MODULE
+module_init(rc80211_simple_init);
+module_exit(rc80211_simple_exit);
+#endif