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authorJohannes Berg <johannes.berg@intel.com>2010-11-30 08:58:45 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-12-22 20:33:37 +0100
commite1e5406854378dfada3f33c7192b012083a5b8e0 (patch)
treee878058f28b8f6db50ef5d73d09aed66dd9ad9f2 /net/mac80211/led.c
parentmac80211: make LED trigger names available early (diff)
downloadlinux-e1e5406854378dfada3f33c7192b012083a5b8e0.tar.xz
linux-e1e5406854378dfada3f33c7192b012083a5b8e0.zip
mac80211: add throughput based LED blink trigger
iwlwifi and other drivers like to blink their LED based on throughput. Implement this generically in mac80211, based on a throughput table the driver specifies. That way, drivers can set the blink frequencies depending on their desired behaviour and max throughput. All the drivers need to do is provide an LED class device, best with blink hardware offload. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/led.c')
-rw-r--r--net/mac80211/led.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/net/mac80211/led.c b/net/mac80211/led.c
index 740a1d4e0a9c..79b13090aed7 100644
--- a/net/mac80211/led.c
+++ b/net/mac80211/led.c
@@ -103,6 +103,13 @@ void ieee80211_led_init(struct ieee80211_local *local)
local->radio_led = NULL;
}
}
+
+ if (local->tpt_led_trigger) {
+ if (led_trigger_register(&local->tpt_led_trigger->trig)) {
+ kfree(local->tpt_led_trigger);
+ local->tpt_led_trigger = NULL;
+ }
+ }
}
void ieee80211_led_exit(struct ieee80211_local *local)
@@ -123,6 +130,11 @@ void ieee80211_led_exit(struct ieee80211_local *local)
led_trigger_unregister(local->rx_led);
kfree(local->rx_led);
}
+
+ if (local->tpt_led_trigger) {
+ led_trigger_unregister(&local->tpt_led_trigger->trig);
+ kfree(local->tpt_led_trigger);
+ }
}
char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
@@ -156,3 +168,112 @@ char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
return local->rx_led_name;
}
EXPORT_SYMBOL(__ieee80211_get_rx_led_name);
+
+static unsigned long tpt_trig_traffic(struct ieee80211_local *local,
+ struct tpt_led_trigger *tpt_trig)
+{
+ unsigned long traffic, delta;
+
+ traffic = tpt_trig->tx_bytes + tpt_trig->rx_bytes;
+
+ delta = traffic - tpt_trig->prev_traffic;
+ tpt_trig->prev_traffic = traffic;
+ return DIV_ROUND_UP(delta, 1024 / 8);
+}
+
+static void tpt_trig_timer(unsigned long data)
+{
+ struct ieee80211_local *local = (void *)data;
+ struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+ struct led_classdev *led_cdev;
+ unsigned long on, off, tpt;
+ int i;
+
+ if (!tpt_trig->running)
+ return;
+
+ mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
+
+ tpt = tpt_trig_traffic(local, tpt_trig);
+
+ /* default to just solid on */
+ on = 1;
+ off = 0;
+
+ for (i = tpt_trig->blink_table_len - 1; i >= 0; i--) {
+ if (tpt_trig->blink_table[i].throughput < 0 ||
+ tpt > tpt_trig->blink_table[i].throughput) {
+ off = tpt_trig->blink_table[i].blink_time / 2;
+ on = tpt_trig->blink_table[i].blink_time - off;
+ break;
+ }
+ }
+
+ read_lock(&tpt_trig->trig.leddev_list_lock);
+ list_for_each_entry(led_cdev, &tpt_trig->trig.led_cdevs, trig_list)
+ led_blink_set(led_cdev, &on, &off);
+ read_unlock(&tpt_trig->trig.leddev_list_lock);
+}
+
+extern char *__ieee80211_create_tpt_led_trigger(
+ struct ieee80211_hw *hw,
+ const struct ieee80211_tpt_blink *blink_table,
+ unsigned int blink_table_len)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct tpt_led_trigger *tpt_trig;
+
+ if (WARN_ON(local->tpt_led_trigger))
+ return NULL;
+
+ tpt_trig = kzalloc(sizeof(struct tpt_led_trigger), GFP_KERNEL);
+ if (!tpt_trig)
+ return NULL;
+
+ snprintf(tpt_trig->name, sizeof(tpt_trig->name),
+ "%stpt", wiphy_name(local->hw.wiphy));
+
+ tpt_trig->trig.name = tpt_trig->name;
+
+ tpt_trig->blink_table = blink_table;
+ tpt_trig->blink_table_len = blink_table_len;
+
+ setup_timer(&tpt_trig->timer, tpt_trig_timer, (unsigned long)local);
+
+ local->tpt_led_trigger = tpt_trig;
+
+ return tpt_trig->name;
+}
+EXPORT_SYMBOL(__ieee80211_create_tpt_led_trigger);
+
+void ieee80211_start_tpt_led_trig(struct ieee80211_local *local)
+{
+ struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+
+ if (!tpt_trig)
+ return;
+
+ /* reset traffic */
+ tpt_trig_traffic(local, tpt_trig);
+ tpt_trig->running = true;
+
+ tpt_trig_timer((unsigned long)local);
+ mod_timer(&tpt_trig->timer, round_jiffies(jiffies + HZ));
+}
+
+void ieee80211_stop_tpt_led_trig(struct ieee80211_local *local)
+{
+ struct tpt_led_trigger *tpt_trig = local->tpt_led_trigger;
+ struct led_classdev *led_cdev;
+
+ if (!tpt_trig)
+ return;
+
+ tpt_trig->running = false;
+ del_timer_sync(&tpt_trig->timer);
+
+ read_lock(&tpt_trig->trig.leddev_list_lock);
+ list_for_each_entry(led_cdev, &tpt_trig->trig.led_cdevs, trig_list)
+ led_brightness_set(led_cdev, LED_OFF);
+ read_unlock(&tpt_trig->trig.leddev_list_lock);
+}