diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00usb.c')
-rw-r--r-- | drivers/net/wireless/rt2x00/rt2x00usb.c | 305 |
1 files changed, 163 insertions, 142 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c index b3317df..1a9937d 100644 --- a/drivers/net/wireless/rt2x00/rt2x00usb.c +++ b/drivers/net/wireless/rt2x00/rt2x00usb.c @@ -195,7 +195,8 @@ static void rt2x00usb_work_txdone(struct work_struct *work) while (!rt2x00queue_empty(queue)) { entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); - if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) + if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || + !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) break; rt2x00usb_work_txdone_entry(entry); @@ -226,9 +227,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb) * Schedule the delayed work for reading the TX status * from the device. */ - if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && - test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) - ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work); + ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work); } static void rt2x00usb_kick_tx_entry(struct queue_entry *entry) @@ -237,8 +236,10 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry) struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); struct queue_entry_priv_usb *entry_priv = entry->priv_data; u32 length; + int status; - if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags)) + if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) || + test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) return; /* @@ -253,121 +254,15 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry) entry->skb->data, length, rt2x00usb_interrupt_txdone, entry); - if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) { + status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); + if (status) { + if (status == -ENODEV) + clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); rt2x00lib_dmadone(entry); } } -void rt2x00usb_kick_tx_queue(struct data_queue *queue) -{ - rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, - rt2x00usb_kick_tx_entry); -} -EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue); - -static void rt2x00usb_kill_tx_entry(struct queue_entry *entry) -{ - struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; - struct queue_entry_priv_usb *entry_priv = entry->priv_data; - struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; - - if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) - return; - - usb_kill_urb(entry_priv->urb); - - /* - * Kill guardian urb (if required by driver). - */ - if ((entry->queue->qid == QID_BEACON) && - (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))) - usb_kill_urb(bcn_priv->guardian_urb); -} - -void rt2x00usb_kill_tx_queue(struct data_queue *queue) -{ - rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, - rt2x00usb_kill_tx_entry); -} -EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue); - -static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) -{ - struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; - unsigned short threshold = queue->threshold; - - WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," - " invoke forced forced reset", queue->qid); - - /* - * Temporarily disable the TX queue, this will force mac80211 - * to use the other queues until this queue has been restored. - * - * Set the queue threshold to the queue limit. This prevents the - * queue from being enabled during the txdone handler. - */ - queue->threshold = queue->limit; - ieee80211_stop_queue(rt2x00dev->hw, queue->qid); - - /* - * Kill all entries in the queue, afterwards we need to - * wait a bit for all URBs to be cancelled. - */ - rt2x00usb_kill_tx_queue(queue); - - /* - * In case that a driver has overriden the txdone_work - * function, we invoke the TX done through there. - */ - rt2x00dev->txdone_work.func(&rt2x00dev->txdone_work); - - /* - * Security measure: if the driver did override the - * txdone_work function, and the hardware did arrive - * in a state which causes it to malfunction, it is - * possible that the driver couldn't handle the txdone - * event correctly. So after giving the driver the - * chance to cleanup, we now force a cleanup of any - * leftovers. - */ - if (!rt2x00queue_empty(queue)) { - WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," - " status handling failed, invoke hard reset", queue->qid); - rt2x00usb_work_txdone(&rt2x00dev->txdone_work); - } - - /* - * The queue has been reset, and mac80211 is allowed to use the - * queue again. - */ - queue->threshold = threshold; - ieee80211_wake_queue(rt2x00dev->hw, queue->qid); -} - -static void rt2x00usb_watchdog_tx_status(struct data_queue *queue) -{ - WARNING(queue->rt2x00dev, "TX queue %d status timed out," - " invoke forced tx handler", queue->qid); - - ieee80211_queue_work(queue->rt2x00dev->hw, &queue->rt2x00dev->txdone_work); -} - -void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) -{ - struct data_queue *queue; - - tx_queue_for_each(rt2x00dev, queue) { - if (!rt2x00queue_empty(queue)) { - if (rt2x00queue_dma_timeout(queue)) - rt2x00usb_watchdog_tx_dma(queue); - if (rt2x00queue_timeout(queue)) - rt2x00usb_watchdog_tx_status(queue); - } - } -} -EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); - /* * RX data handlers. */ @@ -382,7 +277,8 @@ static void rt2x00usb_work_rxdone(struct work_struct *work) while (!rt2x00queue_empty(rt2x00dev->rx)) { entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); - if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) + if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || + !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) break; /* @@ -424,11 +320,157 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb) * Schedule the delayed work for reading the RX status * from the device. */ - if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) && - test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) - ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work); + ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work); } +static void rt2x00usb_kick_rx_entry(struct queue_entry *entry) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); + struct queue_entry_priv_usb *entry_priv = entry->priv_data; + int status; + + if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || + test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) + return; + + rt2x00lib_dmastart(entry); + + usb_fill_bulk_urb(entry_priv->urb, usb_dev, + usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), + entry->skb->data, entry->skb->len, + rt2x00usb_interrupt_rxdone, entry); + + status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); + if (status) { + if (status == -ENODEV) + clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); + set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); + rt2x00lib_dmadone(entry); + } +} + +void rt2x00usb_kick_queue(struct data_queue *queue) +{ + switch (queue->qid) { + case QID_AC_VO: + case QID_AC_VI: + case QID_AC_BE: + case QID_AC_BK: + if (!rt2x00queue_empty(queue)) + rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, + rt2x00usb_kick_tx_entry); + break; + case QID_RX: + if (!rt2x00queue_full(queue)) + rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, + rt2x00usb_kick_rx_entry); + break; + default: + break; + } +} +EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); + +static void rt2x00usb_flush_entry(struct queue_entry *entry) +{ + struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; + struct queue_entry_priv_usb *entry_priv = entry->priv_data; + struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; + + if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) + return; + + usb_kill_urb(entry_priv->urb); + + /* + * Kill guardian urb (if required by driver). + */ + if ((entry->queue->qid == QID_BEACON) && + (test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))) + usb_kill_urb(bcn_priv->guardian_urb); +} + +void rt2x00usb_flush_queue(struct data_queue *queue) +{ + struct work_struct *completion; + unsigned int i; + + rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, + rt2x00usb_flush_entry); + + /* + * Obtain the queue completion handler + */ + switch (queue->qid) { + case QID_AC_VO: + case QID_AC_VI: + case QID_AC_BE: + case QID_AC_BK: + completion = &queue->rt2x00dev->txdone_work; + break; + case QID_RX: + completion = &queue->rt2x00dev->rxdone_work; + break; + default: + return; + } + + for (i = 0; i < 20; i++) { + /* + * Check if the driver is already done, otherwise we + * have to sleep a little while to give the driver/hw + * the oppurtunity to complete interrupt process itself. + */ + if (rt2x00queue_empty(queue)) + break; + + /* + * Schedule the completion handler manually, when this + * worker function runs, it should cleanup the queue. + */ + ieee80211_queue_work(queue->rt2x00dev->hw, completion); + + /* + * Wait for a little while to give the driver + * the oppurtunity to recover itself. + */ + msleep(10); + } +} +EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); + +static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) +{ + WARNING(queue->rt2x00dev, "TX queue %d DMA timed out," + " invoke forced forced reset\n", queue->qid); + + rt2x00queue_flush_queue(queue, true); +} + +static void rt2x00usb_watchdog_tx_status(struct data_queue *queue) +{ + WARNING(queue->rt2x00dev, "TX queue %d status timed out," + " invoke forced tx handler\n", queue->qid); + + ieee80211_queue_work(queue->rt2x00dev->hw, &queue->rt2x00dev->txdone_work); +} + +void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) +{ + struct data_queue *queue; + + tx_queue_for_each(rt2x00dev, queue) { + if (!rt2x00queue_empty(queue)) { + if (rt2x00queue_dma_timeout(queue)) + rt2x00usb_watchdog_tx_dma(queue); + if (rt2x00queue_status_timeout(queue)) + rt2x00usb_watchdog_tx_status(queue); + } + } +} +EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); + /* * Radio handlers */ @@ -436,12 +478,6 @@ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) { rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, REGISTER_TIMEOUT); - - /* - * The USB version of kill_tx_queue also works - * on the RX queue. - */ - rt2x00dev->ops->lib->kill_tx_queue(rt2x00dev->rx); } EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); @@ -450,25 +486,10 @@ EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); */ void rt2x00usb_clear_entry(struct queue_entry *entry) { - struct usb_device *usb_dev = - to_usb_device_intf(entry->queue->rt2x00dev->dev); - struct queue_entry_priv_usb *entry_priv = entry->priv_data; - int pipe; - entry->flags = 0; - if (entry->queue->qid == QID_RX) { - pipe = usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint); - usb_fill_bulk_urb(entry_priv->urb, usb_dev, pipe, - entry->skb->data, entry->skb->len, - rt2x00usb_interrupt_rxdone, entry); - - set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); - if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) { - set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); - rt2x00lib_dmadone(entry); - } - } + if (entry->queue->qid == QID_RX) + rt2x00usb_kick_rx_entry(entry); } EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |