rt2x00: Queue handling overhaul

This introduces a big queue handling overhaul, this also
renames "ring" to "queues".

Move queue handling into rt2x00queue.c and the matching header,
use Kerneldoc to improve rt2x00 library documentation.

Access to the queues is now protected under a spinlock, this
to prevent race conditions which could corrupt the indexing
system of the queue.

Each queue entry allocates x bytes for driver/device specific data,
this cleans up the queue structure significantly and improves
code readability.

rt2500usb no longer needs 2 entries in the beacon queue to correctly
send out the guardian byte. This is now handled in the entry specific
structure.

rt61 and rt73 now use the correct descriptor size for beacon frames,
since this data is written into the registers not the entire TXD
descriptor was used but instead of a subset of it named TXINFO.

Finally this also fixes numerous other bugs related to incorrect
beacon handling or beacon related code.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 45 insertions, 3 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.h b/drivers/net/wireless/rt2x00/rt2x00usb.h
index b5c1d176c481..af606638e227 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.h
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.h
@@ -160,16 +160,58 @@ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev);
  * TX data handlers.
  */
 int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
-			    struct data_ring *ring, struct sk_buff *skb,
+			    struct data_queue *queue, struct sk_buff *skb,
 			    struct ieee80211_tx_control *control);
 
+/**
+ * struct queue_entry_priv_usb_rx: Per RX entry USB specific information
+ *
+ * @urb: Urb structure used for device communication.
+ */
+struct queue_entry_priv_usb_rx {
+	struct urb *urb;
+};
+
+/**
+ * struct queue_entry_priv_usb_tx: Per TX entry USB specific information
+ *
+ * @urb: Urb structure used for device communication.
+ * @control: mac80211 control structure used to transmit data.
+ */
+struct queue_entry_priv_usb_tx {
+	struct urb *urb;
+
+	struct ieee80211_tx_control control;
+};
+
+/**
+ * struct queue_entry_priv_usb_tx: Per TX entry USB specific information
+ *
+ * The first section should match &struct queue_entry_priv_usb_tx exactly.
+ * rt2500usb can use this structure to send a guardian byte when working
+ * with beacons.
+ *
+ * @urb: Urb structure used for device communication.
+ * @control: mac80211 control structure used to transmit data.
+ * @guardian_data: Set to 0, used for sending the guardian data.
+ * @guardian_urb: Urb structure used to send the guardian data.
+ */
+struct queue_entry_priv_usb_bcn {
+	struct urb *urb;
+
+	struct ieee80211_tx_control control;
+
+	unsigned int guardian_data;
+	struct urb *guardian_urb;
+};
+
 /*
  * Device initialization handlers.
  */
 void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
-			    struct data_entry *entry);
+			    struct queue_entry *entry);
 void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev,
-			    struct data_entry *entry);
+			    struct queue_entry *entry);
 int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev);
 void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev);