[PATCH] bcm43xx: improved statistics

This minor patch for wireless-2.6 (softmac) adjusts the parameters of
the wireless statistics to improve the display of programs such as the
"Wireless Network Information" applet of KDE. Thanks to Dan Williams
and Jean Tourrilhes for valuable help in setting up the return of
info in dBm.

Signed-Off-By: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
index 8ffd760dc830671b2ad88330ef6b939bef57d4e0..1d3a3aaf96ec4bf9cc7a3aa3a29156fd7bde96d1 100644 (file)
--- a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
@@ -47,9 +47,8 @@
 #define BCM43xx_WX_VERSION     18
 
 #define MAX_WX_STRING          80
-/* FIXME: the next line is a guess as to what the maximum value of RX power
-          (in dBm) might be */
-#define RX_POWER_MAX           -10
+/* FIXME: the next line is a guess as to what the maximum RSSI value might be */
+#define RX_RSSI_MAX            60
 
 
 static int bcm43xx_wx_get_name(struct net_device *net_dev,
@@ -230,9 +229,8 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
        range->throughput = 27 * 1000 * 1000;
 
        range->max_qual.qual = 100;
-       /* TODO: Real max RSSI */
-       range->max_qual.level = 0;
-       range->max_qual.noise = 0;
+       range->max_qual.level = 152; /* set floor at -104 dBm (152 - 256) */
+       range->max_qual.noise = 152;
        range->max_qual.updated = IW_QUAL_ALL_UPDATED;
 
        range->avg_qual.qual = 50;
@@ -845,6 +843,7 @@ static struct iw_statistics *bcm43xx_get_wireless_stats(struct net_device *net_d
        struct iw_statistics *wstats;
        struct ieee80211_network *network = NULL;
        static int tmp_level = 0;
+       static int tmp_qual = 0;
        unsigned long flags;
 
        wstats = &bcm->stats.wstats;
@@ -863,25 +862,28 @@ static struct iw_statistics *bcm43xx_get_wireless_stats(struct net_device *net_d
                wstats->qual.level = 0;
                wstats->qual.noise = 0;
                wstats->qual.updated = 7;
-               wstats->qual.updated |= IW_QUAL_ALL_UPDATED;
+               wstats->qual.updated |= IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
                return wstats;
        }
        /* fill in the real statistics when iface associated */
        spin_lock_irqsave(&mac->ieee->lock, flags);
        list_for_each_entry(network, &mac->ieee->network_list, list) {
                if (!memcmp(mac->associnfo.bssid, network->bssid, ETH_ALEN)) {
-                       if (!tmp_level)         /* get initial value */
-                               tmp_level = network->stats.rssi;
-                       else                    /* smooth results */
-                               tmp_level = (7 * tmp_level + network->stats.rssi)/8;
+                       if (!tmp_level) {       /* get initial values */
+                               tmp_level = network->stats.signal;
+                               tmp_qual = network->stats.rssi;
+                       } else {                /* smooth results */
+                               tmp_level = (15 * tmp_level + network->stats.signal)/16;
+                               tmp_qual = (15 * tmp_qual + network->stats.rssi)/16;
+                       }
                        break;
                }
        }
        spin_unlock_irqrestore(&mac->ieee->lock, flags);
        wstats->qual.level = tmp_level;
-       wstats->qual.qual = 100 + tmp_level - RX_POWER_MAX; // TODO: get the real signal quality
+       wstats->qual.qual = 100 * tmp_qual / RX_RSSI_MAX;
        wstats->qual.noise = bcm->stats.noise;
-       wstats->qual.updated = IW_QUAL_ALL_UPDATED;
+       wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
        wstats->discard.code = bcm->ieee->ieee_stats.rx_discards_undecryptable;
        wstats->discard.retries = bcm->ieee->ieee_stats.tx_retry_limit_exceeded;
        wstats->discard.nwid = bcm->ieee->ieee_stats.tx_discards_wrong_sa;

diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c
index 6dbd855b3647b0f80163c5c48893d051b6ae19e5..c0efbfe605a5a20d3996a5f173a9e4657aac3dde 100644 (file)
--- a/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_xmit.c
@@ -492,16 +492,15 @@ int bcm43xx_rx(struct bcm43xx_private *bcm,
 
        memset(&stats, 0, sizeof(stats));
        stats.mac_time = le16_to_cpu(rxhdr->mactime);
-       stats.rssi = bcm43xx_rssi_postprocess(bcm, rxhdr->rssi, is_ofdm,
+       stats.rssi = rxhdr->rssi;
+       stats.signal = bcm43xx_rssi_postprocess(bcm, rxhdr->rssi, is_ofdm,
                                              !!(rxflags1 & BCM43xx_RXHDR_FLAGS1_2053RSSIADJ),
                                              !!(rxflags3 & BCM43xx_RXHDR_FLAGS3_2050RSSIADJ));
-       stats.signal = rxhdr->signal_quality;   //FIXME
 //TODO stats.noise = 
        if (is_ofdm)
                stats.rate = bcm43xx_plcp_get_bitrate_ofdm(plcp);
        else
                stats.rate = bcm43xx_plcp_get_bitrate_cck(plcp);
-//printk("RX ofdm %d, rate == %u\n", is_ofdm, stats.rate);
        stats.received_channel = radio->channel;
 //TODO stats.control = 
        stats.mask = IEEE80211_STATMASK_SIGNAL |