---

yaml
---
r: 213997
b: refs/heads/master
c: 7e613e1
h: refs/heads/master
i:
  213995: 4296ab3
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c17512d846a4b063c8d3e708d82c0664d9c7182e
+refs/heads/master: 7e613e1666d59b5364f7918b3427bf328ac5f9ca

trunk/drivers/net/wireless/rt2x00/rt2x00.h

@@ -1,5 +1,6 @@
 /*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
+	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
 	<http://rt2x00.serialmonkey.com>
 
@@ -862,6 +863,12 @@ struct rt2x00_dev {
 	 */
 	struct work_struct intf_work;
 
+	/**
+	 * Scheduled work for TX/RX done handling (USB devices)
+	 */
+	struct work_struct rxdone_work;
+	struct work_struct txdone_work;
+
 	/*
 	 * Data queue arrays for RX, TX and Beacon.
 	 * The Beacon array also contains the Atim queue

trunk/drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -1,5 +1,6 @@
 /*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
+	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 	<http://rt2x00.serialmonkey.com>
 
 	This program is free software; you can redistribute it and/or modify
@@ -383,15 +384,7 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 	 * send the status report back.
 	 */
 	if (!(skbdesc_flags & SKBDESC_NOT_MAC80211))
-		/*
-		 * Only PCI and SOC devices process the tx status in process
-		 * context. Hence use ieee80211_tx_status for PCI and SOC
-		 * devices and stick to ieee80211_tx_status_irqsafe for USB.
-		 */
-		if (rt2x00_is_usb(rt2x00dev))
-			ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
-		else
-			ieee80211_tx_status(rt2x00dev->hw, entry->skb);
+		ieee80211_tx_status(rt2x00dev->hw, entry->skb);
 	else
 		dev_kfree_skb_any(entry->skb);
 
@@ -403,7 +396,6 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 
 	rt2x00dev->ops->lib->clear_entry(entry);
 
-	clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 	rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 
 	/*
@@ -463,6 +455,10 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 	struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 	unsigned int header_length;
 	int rate_idx;
+
+	if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
+		goto submit_entry;
+
 	/*
 	 * Allocate a new sk_buffer. If no new buffer available, drop the
 	 * received frame and reuse the existing buffer.
@@ -540,26 +536,17 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 	 */
 	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
 	memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
-
-	/*
-	 * Currently only PCI and SOC devices handle rx interrupts in process
-	 * context. Hence, use ieee80211_rx_irqsafe for USB and ieee80211_rx_ni
-	 * for PCI and SOC devices.
-	 */
-	if (rt2x00_is_usb(rt2x00dev))
-		ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
-	else
-		ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
+	ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
 
 	/*
 	 * Replace the skb with the freshly allocated one.
 	 */
 	entry->skb = skb;
-	entry->flags = 0;
 
+submit_entry:
 	rt2x00dev->ops->lib->clear_entry(entry);
-
 	rt2x00queue_index_inc(entry->queue, Q_INDEX);
+	rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
 }
 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 
@@ -1017,6 +1004,8 @@ void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 	 * Stop all work.
 	 */
 	cancel_work_sync(&rt2x00dev->intf_work);
+	cancel_work_sync(&rt2x00dev->rxdone_work);
+	cancel_work_sync(&rt2x00dev->txdone_work);
 
 	/*
 	 * Uninitialize device.

trunk/drivers/net/wireless/rt2x00/rt2x00queue.c

@@ -1,5 +1,6 @@
 /*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
+	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
 	<http://rt2x00.serialmonkey.com>
 
@@ -730,9 +731,9 @@ void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev)
 		rt2x00queue_reset(queue);
 
 		for (i = 0; i < queue->limit; i++) {
-			queue->entries[i].flags = 0;
-
 			rt2x00dev->ops->lib->clear_entry(&queue->entries[i]);
+			if (queue->qid == QID_RX)
+				rt2x00queue_index_inc(queue, Q_INDEX);
 		}
 	}
 }

trunk/drivers/net/wireless/rt2x00/rt2x00queue.h

@@ -1,5 +1,5 @@
 /*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 	<http://rt2x00.serialmonkey.com>
 
 	This program is free software; you can redistribute it and/or modify
@@ -363,12 +363,16 @@ struct txentry_desc {
  *	the device has signaled it is done with it.
  * @ENTRY_DATA_PENDING: This entry contains a valid frame and is waiting
  *	for the signal to start sending.
+ * @ENTRY_DATA_IO_FAILED: Hardware indicated that an IO error occured
+ *	while transfering the data to the hardware. No TX status report will
+ *	be expected from the hardware.
  */
 enum queue_entry_flags {
 	ENTRY_BCN_ASSIGNED,
 	ENTRY_OWNER_DEVICE_DATA,
 	ENTRY_OWNER_DEVICE_CRYPTO,
 	ENTRY_DATA_PENDING,
+	ENTRY_DATA_IO_FAILED
 };
 
 /**

trunk/drivers/net/wireless/rt2x00/rt2x00usb.c

@@ -1,5 +1,6 @@
 /*
-	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
+	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
 	<http://rt2x00.serialmonkey.com>
 
 	This program is free software; you can redistribute it and/or modify
@@ -167,35 +168,69 @@ EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
 /*
  * TX data handlers.
  */
-static void rt2x00usb_interrupt_txdone(struct urb *urb)
+static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
 {
-	struct queue_entry *entry = (struct queue_entry *)urb->context;
-	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
 	struct txdone_entry_desc txdesc;
 
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
-	    !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
-		return;
-
 	/*
-	 * Obtain the status about this packet.
-	 * Note that when the status is 0 it does not mean the
+	 * If the transfer to hardware succeeded, it does not mean the
 	 * frame was send out correctly. It only means the frame
 	 * was succesfully pushed to the hardware, we have no
 	 * way to determine the transmission status right now.
 	 * (Only indirectly by looking at the failed TX counters
 	 * in the register).
 	 */
 	txdesc.flags = 0;
-	if (!urb->status)
-		__set_bit(TXDONE_UNKNOWN, &txdesc.flags);
-	else
+	if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
 		__set_bit(TXDONE_FAILURE, &txdesc.flags);
+	else
+		__set_bit(TXDONE_UNKNOWN, &txdesc.flags);
 	txdesc.retry = 0;
 
 	rt2x00lib_txdone(entry, &txdesc);
 }
 
+static void rt2x00usb_work_txdone(struct work_struct *work)
+{
+	struct rt2x00_dev *rt2x00dev =
+	    container_of(work, struct rt2x00_dev, txdone_work);
+	struct data_queue *queue;
+	struct queue_entry *entry;
+
+	tx_queue_for_each(rt2x00dev, queue) {
+		while (!rt2x00queue_empty(queue)) {
+			entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
+
+			if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+				break;
+
+			rt2x00usb_work_txdone_entry(entry);
+		}
+	}
+}
+
+static void rt2x00usb_interrupt_txdone(struct urb *urb)
+{
+	struct queue_entry *entry = (struct queue_entry *)urb->context;
+	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+
+	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
+	    !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+		return;
+
+	/*
+	 * Check if the frame was correctly uploaded
+	 */
+	if (urb->status)
+		__set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
+
+	/*
+	 * Schedule the delayed work for reading the TX status
+	 * from the device.
+	 */
+	ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->txdone_work);
+}
+
 static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
 {
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
@@ -294,6 +329,7 @@ EXPORT_SYMBOL_GPL(rt2x00usb_kill_tx_queue);
 
 static void rt2x00usb_watchdog_reset_tx(struct data_queue *queue)
 {
+	struct queue_entry *entry;
 	struct queue_entry_priv_usb *entry_priv;
 	unsigned short threshold = queue->threshold;
 
@@ -313,14 +349,22 @@ static void rt2x00usb_watchdog_reset_tx(struct data_queue *queue)
 	 * Reset all currently uploaded TX frames.
 	 */
 	while (!rt2x00queue_empty(queue)) {
-		entry_priv = rt2x00queue_get_entry(queue, Q_INDEX_DONE)->priv_data;
+		entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
+		entry_priv = entry->priv_data;
 		usb_kill_urb(entry_priv->urb);
 
 		/*
 		 * We need a short delay here to wait for
-		 * the URB to be canceled and invoked the tx_done handler.
+		 * the URB to be canceled
 		 */
-		udelay(200);
+		do {
+			udelay(100);
+		} while (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags));
+
+		/*
+		 * Invoke the TX done handler
+		 */
+		rt2x00usb_work_txdone_entry(entry);
 	}
 
 	/*
@@ -345,38 +389,56 @@ EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
 /*
  * RX data handlers.
  */
+static void rt2x00usb_work_rxdone(struct work_struct *work)
+{
+	struct rt2x00_dev *rt2x00dev =
+	    container_of(work, struct rt2x00_dev, rxdone_work);
+	struct queue_entry *entry;
+	struct skb_frame_desc *skbdesc;
+	u8 rxd[32];
+
+	while (!rt2x00queue_empty(rt2x00dev->rx)) {
+		entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
+
+		if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+			break;
+
+		/*
+		 * Fill in desc fields of the skb descriptor
+		 */
+		skbdesc = get_skb_frame_desc(entry->skb);
+		skbdesc->desc = rxd;
+		skbdesc->desc_len = entry->queue->desc_size;
+
+		/*
+		 * Send the frame to rt2x00lib for further processing.
+		 */
+		rt2x00lib_rxdone(rt2x00dev, entry);
+	}
+}
+
 static void rt2x00usb_interrupt_rxdone(struct urb *urb)
 {
 	struct queue_entry *entry = (struct queue_entry *)urb->context;
 	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
-	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
-	u8 rxd[32];
 
 	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
-	    !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+	    !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
 		return;
 
 	/*
 	 * Check if the received data is simply too small
 	 * to be actually valid, or if the urb is signaling
 	 * a problem.
 	 */
-	if (urb->actual_length < entry->queue->desc_size || urb->status) {
-		set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
-		usb_submit_urb(urb, GFP_ATOMIC);
-		return;
-	}
-
-	/*
-	 * Fill in desc fields of the skb descriptor
-	 */
-	skbdesc->desc = rxd;
-	skbdesc->desc_len = entry->queue->desc_size;
+	if (urb->actual_length < entry->queue->desc_size || urb->status)
+		__set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
 
 	/*
-	 * Send the frame to rt2x00lib for further processing.
+	 * Schedule the delayed work for reading the RX status
+	 * from the device.
 	 */
-	rt2x00lib_rxdone(rt2x00dev, entry);
+	ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->rxdone_work);
 }
 
 /*
@@ -405,6 +467,8 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
 	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,
@@ -413,8 +477,6 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
 
 		set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
 		usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
-	} else {
-		entry->flags = 0;
 	}
 }
 EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
@@ -659,6 +721,9 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
 
 	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
 
+	INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
+	INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
+
 	retval = rt2x00usb_alloc_reg(rt2x00dev);
 	if (retval)
 		goto exit_free_device;