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mt76: mt76u: rely on a dedicated stats workqueue

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rate controller and throughput are very sensitive to tx status timing.
In order to improve performances when the system is heavily loaded,
substitute stat_work delayed_work with a regular work_struct and create
a mt76u dedicated workqueue for tx status reporting

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2019-10-28 17:38:05 +01:00 committed by Felix Fietkau
parent 80df01f4dc
commit 284efb473e
4 changed files with 25 additions and 10 deletions
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4
drivers/net/wireless/mediatek/mt76/mt76.h
View File

@ -387,7 +387,8 @@ struct mt76_usb {
};
struct tasklet_struct rx_tasklet;
struct delayed_work stat_work;
struct workqueue_struct *stat_wq;
struct work_struct stat_work;
u8 out_ep[__MT_EP_OUT_MAX];
u8 in_ep[__MT_EP_IN_MAX];
@ -823,6 +824,7 @@ int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
void mt76u_single_wr(struct mt76_dev *dev, const u8 req,
const u16 offset, const u32 val);
int mt76u_init(struct mt76_dev *dev, struct usb_interface *intf);
void mt76u_deinit(struct mt76_dev *dev);
int mt76u_alloc_queues(struct mt76_dev *dev);
void mt76u_stop_tx(struct mt76_dev *dev);
void mt76u_stop_rx(struct mt76_dev *dev);

2
drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
View File

@ -273,6 +273,7 @@ static int mt76x0u_probe(struct usb_interface *usb_intf,
err:
usb_set_intfdata(usb_intf, NULL);
usb_put_dev(interface_to_usbdev(usb_intf));
mt76u_deinit(&dev->mt76);
ieee80211_free_hw(mdev->hw);
return ret;
@ -292,6 +293,7 @@ static void mt76x0_disconnect(struct usb_interface *usb_intf)
usb_set_intfdata(usb_intf, NULL);
usb_put_dev(interface_to_usbdev(usb_intf));
mt76u_deinit(&dev->mt76);
ieee80211_free_hw(dev->mt76.hw);
}

2
drivers/net/wireless/mediatek/mt76/mt76x2/usb.c
View File

@ -73,6 +73,7 @@ static int mt76x2u_probe(struct usb_interface *intf,
err:
ieee80211_free_hw(mt76_hw(dev));
mt76u_deinit(&dev->mt76);
usb_set_intfdata(intf, NULL);
usb_put_dev(udev);
@ -88,6 +89,7 @@ static void mt76x2u_disconnect(struct usb_interface *intf)
set_bit(MT76_REMOVED, &dev->mt76.state);
ieee80211_unregister_hw(hw);
mt76x2u_cleanup(dev);
mt76u_deinit(&dev->mt76);
ieee80211_free_hw(hw);
usb_set_intfdata(intf, NULL);

27
drivers/net/wireless/mediatek/mt76/usb.c
View File

@ -697,10 +697,7 @@ static void mt76u_tx_tasklet(unsigned long data)
mt76_txq_schedule(dev, i);
if (!test_and_set_bit(MT76_READING_STATS, &dev->state))
ieee80211_queue_delayed_work(dev->hw,
&dev->usb.stat_work,
msecs_to_jiffies(10));
queue_work(dev->usb.stat_wq, &dev->usb.stat_work);
if (wake)
ieee80211_wake_queue(dev->hw, i);
}
@ -713,7 +710,7 @@ static void mt76u_tx_status_data(struct work_struct *work)
u8 update = 1;
u16 count = 0;
usb = container_of(work, struct mt76_usb, stat_work.work);
usb = container_of(work, struct mt76_usb, stat_work);
dev = container_of(usb, struct mt76_dev, usb);
while (true) {
@ -726,8 +723,7 @@ static void mt76u_tx_status_data(struct work_struct *work)
}
if (count && test_bit(MT76_STATE_RUNNING, &dev->state))
ieee80211_queue_delayed_work(dev->hw, &usb->stat_work,
msecs_to_jiffies(10));
queue_work(usb->stat_wq, &usb->stat_work);
else
clear_bit(MT76_READING_STATS, &dev->state);
}
@ -908,7 +904,7 @@ void mt76u_stop_tx(struct mt76_dev *dev)
}
}
cancel_delayed_work_sync(&dev->usb.stat_work);
cancel_work_sync(&dev->usb.stat_work);
clear_bit(MT76_READING_STATS, &dev->state);
mt76_tx_status_check(dev, NULL, true);
@ -959,9 +955,13 @@ int mt76u_init(struct mt76_dev *dev,
tasklet_init(&usb->rx_tasklet, mt76u_rx_tasklet, (unsigned long)dev);
tasklet_init(&dev->tx_tasklet, mt76u_tx_tasklet, (unsigned long)dev);
INIT_DELAYED_WORK(&usb->stat_work, mt76u_tx_status_data);
INIT_WORK(&usb->stat_work, mt76u_tx_status_data);
skb_queue_head_init(&dev->rx_skb[MT_RXQ_MAIN]);
usb->stat_wq = alloc_workqueue("mt76u", WQ_UNBOUND, 0);
if (!usb->stat_wq)
return -ENOMEM;
mutex_init(&usb->mcu.mutex);
mutex_init(&usb->usb_ctrl_mtx);
@ -976,5 +976,14 @@ int mt76u_init(struct mt76_dev *dev,
}
EXPORT_SYMBOL_GPL(mt76u_init);
void mt76u_deinit(struct mt76_dev *dev)
{
if (dev->usb.stat_wq) {
destroy_workqueue(dev->usb.stat_wq);
dev->usb.stat_wq = NULL;
}
}
EXPORT_SYMBOL_GPL(mt76u_deinit);
MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
MODULE_LICENSE("Dual BSD/GPL");