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rt2x00: Use pretbtt irq for fetching beacons on rt2800pci

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Updating the beacon on pre tbtt instead of beacondone allows much lower
latency in regard to TIM updates. Hence, use the pre tbtt interrupt for
updating the beacon in rt2800pci (older devices don't provide a pre tbtt
interrupt).

Also, add a new driver flag to indicate if a driver has pre tbtt support
or not and implement the according behavior in rt2x00lib.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Helmut Schaa
2010-07-11 12:28:23 +02:00
committed by John W. Linville
parent 07896fe2f4
commit 9f926fb57a
5 changed files with 72 additions and 12 deletions
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26
drivers/net/wireless/rt2x00/rt2x00dev.c
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@@ -200,8 +200,8 @@ static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
}
}
static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
static void rt2x00lib_beaconupdate_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct rt2x00_dev *rt2x00dev = data;
@@ -223,15 +223,33 @@ void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
ieee80211_iterate_active_interfaces(rt2x00dev->hw,
rt2x00lib_bc_buffer_iter,
rt2x00dev);
/*
* Devices with pre tbtt interrupt don't need to update the beacon
* here as they will fetch the next beacon directly prior to
* transmission.
*/
if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT, &rt2x00dev->flags))
return;
/* fetch next beacon */
ieee80211_iterate_active_interfaces(rt2x00dev->hw,
rt2x00lib_beacondone_iter,
rt2x00lib_beaconupdate_iter,
rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev)
{
if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
return;
/* fetch next beacon */
ieee80211_iterate_active_interfaces(rt2x00dev->hw,
rt2x00lib_beaconupdate_iter,
rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt);
void rt2x00lib_txdone(struct queue_entry *entry,
struct txdone_entry_desc *txdesc)
{