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p54: improve site survey

Forráskód böngészése 
The firmware keeps track of channel usage. This data can
be used by the automatic channel selection to find the best
channel.

Survey data from wlan4
	frequency:				5200 MHz [in use]
	noise:					-91 dBm
	channel active time:			811909 ms
	channel busy time:			63395 ms
	channel transmit time:			59636 ms
Survey data from wlan4
	frequency:				5210 MHz
	noise:					-91 dBm
	channel active time:			121 ms
	channel busy time:			119 ms
	channel transmit time:			0 ms

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter
2011-08-20 01:53:59 +02:00
committed by John W. Linville
szülő 6423d30f03
commit 0d78156eef
5 fájl változott, egészen pontosan 211 új sor hozzáadva és 14 régi sor törölve
Download Patch File Download Diff File Expand all files Collapse all files

113
drivers/net/wireless/p54/main.c
Fájl megtekintése

@@ -204,13 +204,11 @@ static void p54_stop(struct ieee80211_hw *dev)
struct p54_common *priv = dev->priv;
int i;
mutex_lock(&priv->conf_mutex);
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
priv->softled_state = 0;
p54_set_leds(priv);
cancel_delayed_work_sync(&priv->work);
mutex_lock(&priv->conf_mutex);
p54_set_leds(priv);
priv->stop(dev);
skb_queue_purge(&priv->tx_pending);
skb_queue_purge(&priv->tx_queue);
@@ -278,6 +276,42 @@ static void p54_remove_interface(struct ieee80211_hw *dev,
mutex_unlock(&priv->conf_mutex);
}
static int p54_wait_for_stats(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
int ret;
priv->update_stats = true;
ret = p54_fetch_statistics(priv);
if (ret)
return ret;
ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ);
if (ret == 0)
return -ETIMEDOUT;
return 0;
}
static void p54_reset_stats(struct p54_common *priv)
{
struct ieee80211_channel *chan = priv->curchan;
if (chan) {
struct survey_info *info = &priv->survey[chan->hw_value];
/* only reset channel statistics, don't touch .filled, etc. */
info->channel_time = 0;
info->channel_time_busy = 0;
info->channel_time_tx = 0;
}
priv->update_stats = true;
priv->survey_raw.active = 0;
priv->survey_raw.cca = 0;
priv->survey_raw.tx = 0;
}
static int p54_config(struct ieee80211_hw *dev, u32 changed)
{
int ret = 0;
@@ -288,19 +322,36 @@ static int p54_config(struct ieee80211_hw *dev, u32 changed)
if (changed & IEEE80211_CONF_CHANGE_POWER)
priv->output_power = conf->power_level << 2;
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *oldchan;
WARN_ON(p54_wait_for_stats(dev));
oldchan = priv->curchan;
priv->curchan = NULL;
ret = p54_scan(priv, P54_SCAN_EXIT, 0);
if (ret)
if (ret) {
priv->curchan = oldchan;
goto out;
}
/*
* TODO: Use the LM_SCAN_TRAP to determine the current
* operating channel.
*/
priv->curchan = priv->hw->conf.channel;
p54_reset_stats(priv);
WARN_ON(p54_fetch_statistics(priv));
}
if (changed & IEEE80211_CONF_CHANGE_PS) {
WARN_ON(p54_wait_for_stats(dev));
ret = p54_set_ps(priv);
if (ret)
goto out;
WARN_ON(p54_wait_for_stats(dev));
}
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
WARN_ON(p54_wait_for_stats(dev));
ret = p54_setup_mac(priv);
if (ret)
goto out;
WARN_ON(p54_wait_for_stats(dev));
}
out:
@@ -384,7 +435,9 @@ static void p54_work(struct work_struct *work)
* 2. cancel stuck frames / reset the device if necessary.
*/
p54_fetch_statistics(priv);
mutex_lock(&priv->conf_mutex);
WARN_ON_ONCE(p54_fetch_statistics(priv));
mutex_unlock(&priv->conf_mutex);
}
static int p54_get_stats(struct ieee80211_hw *dev,
@@ -541,16 +594,47 @@ static int p54_get_survey(struct ieee80211_hw *dev, int idx,
struct survey_info *survey)
{
struct p54_common *priv = dev->priv;
struct ieee80211_conf *conf = &dev->conf;
struct ieee80211_channel *chan;
int err, tries;
bool in_use = false;
if (idx != 0)
if (idx >= priv->chan_num)
return -ENOENT;
survey->channel = conf->channel;
survey->filled = SURVEY_INFO_NOISE_DBM;
survey->noise = clamp_t(s8, priv->noise, -128, 127);
#define MAX_TRIES 1
for (tries = 0; tries < MAX_TRIES; tries++) {
chan = priv->curchan;
if (chan && chan->hw_value == idx) {
mutex_lock(&priv->conf_mutex);
err = p54_wait_for_stats(dev);
mutex_unlock(&priv->conf_mutex);
if (err)
return err;
return 0;
in_use = true;
}
memcpy(survey, &priv->survey[idx], sizeof(*survey));
if (in_use) {
/* test if the reported statistics are valid. */
if (survey->channel_time != 0) {
survey->filled |= SURVEY_INFO_IN_USE;
} else {
/*
* hw/fw has not accumulated enough sample sets.
* Wait for 100ms, this ought to be enough to
* to get at least one non-null set of channel
* usage statistics.
*/
msleep(100);
continue;
}
}
return 0;
}
return -ETIMEDOUT;
#undef MAX_TRIES
}
static unsigned int p54_flush_count(struct p54_common *priv)
@@ -686,11 +770,14 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
mutex_init(&priv->conf_mutex);
mutex_init(&priv->eeprom_mutex);
init_completion(&priv->stat_comp);
init_completion(&priv->eeprom_comp);
init_completion(&priv->beacon_comp);
INIT_DELAYED_WORK(&priv->work, p54_work);
memset(&priv->mc_maclist[0], ~0, ETH_ALEN);
priv->curchan = NULL;
p54_reset_stats(priv);
return dev;
}
EXPORT_SYMBOL_GPL(p54_init_common);
@@ -730,11 +817,13 @@ void p54_free_common(struct ieee80211_hw *dev)
kfree(priv->curve_data);
kfree(priv->rssi_db);
kfree(priv->used_rxkeys);
kfree(priv->survey);
priv->iq_autocal = NULL;
priv->output_limit = NULL;
priv->curve_data = NULL;
priv->rssi_db = NULL;
priv->used_rxkeys = NULL;
priv->survey = NULL;
ieee80211_free_hw(dev);
}
EXPORT_SYMBOL_GPL(p54_free_common);