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path: root/drivers/net/wireless/rt2x00/rt2x00usb.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00usb.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00usb.c361
1 files changed, 131 insertions, 230 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index e5ceae8..83862e7 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -40,7 +40,7 @@ int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
void *buffer, const u16 buffer_length,
const int timeout)
{
- struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev);
+ struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
int status;
unsigned int i;
unsigned int pipe =
@@ -129,17 +129,12 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
{
struct queue_entry *entry = (struct queue_entry *)urb->context;
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
- struct queue_entry_priv_usb_tx *priv_tx = entry->priv_data;
struct txdone_entry_desc txdesc;
- __le32 *txd = (__le32 *)entry->skb->data;
- u32 word;
if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
- !__test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+ !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return;
- rt2x00_desc_read(txd, 0, &word);
-
/*
* Remove the descriptor data from the buffer.
*/
@@ -147,128 +142,116 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
/*
* Obtain the status about this packet.
+ * Note that when the status is 0 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.status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY;
+ if (!urb->status)
+ __set_bit(TXDONE_UNKNOWN, &txdesc.flags);
+ else
+ __set_bit(TXDONE_FAILURE, &txdesc.flags);
txdesc.retry = 0;
- txdesc.control = &priv_tx->control;
rt2x00lib_txdone(entry, &txdesc);
-
- /*
- * Make this entry available for reuse.
- */
- entry->flags = 0;
- rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
-
- /*
- * If the data queue was full before the txdone handler
- * we must make sure the packet queue in the mac80211 stack
- * is reenabled when the txdone handler has finished.
- */
- if (!rt2x00queue_full(entry->queue))
- ieee80211_wake_queue(rt2x00dev->hw, priv_tx->control.queue);
}
-int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
- struct data_queue *queue, struct sk_buff *skb,
- struct ieee80211_tx_control *control)
+int rt2x00usb_write_tx_data(struct queue_entry *entry)
{
- struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev);
- struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX);
- struct queue_entry_priv_usb_tx *priv_tx = entry->priv_data;
+ 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;
struct skb_frame_desc *skbdesc;
u32 length;
- if (rt2x00queue_full(queue))
- return -EINVAL;
-
- if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) {
- ERROR(rt2x00dev,
- "Arrived at non-free entry in the non-full queue %d.\n"
- "Please file bug report to %s.\n",
- control->queue, DRV_PROJECT);
- return -EINVAL;
- }
-
/*
* Add the descriptor in front of the skb.
*/
- skb_push(skb, queue->desc_size);
- memset(skb->data, 0, queue->desc_size);
+ skb_push(entry->skb, entry->queue->desc_size);
+ memset(entry->skb->data, 0, entry->queue->desc_size);
/*
* Fill in skb descriptor
*/
- skbdesc = get_skb_frame_desc(skb);
- skbdesc->data = skb->data + queue->desc_size;
- skbdesc->data_len = skb->len - queue->desc_size;
- skbdesc->desc = skb->data;
- skbdesc->desc_len = queue->desc_size;
- skbdesc->entry = entry;
-
- memcpy(&priv_tx->control, control, sizeof(priv_tx->control));
- rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
+ skbdesc = get_skb_frame_desc(entry->skb);
+ skbdesc->desc = entry->skb->data;
+ skbdesc->desc_len = entry->queue->desc_size;
/*
* USB devices cannot blindly pass the skb->len as the
* length of the data to usb_fill_bulk_urb. Pass the skb
* to the driver to determine what the length should be.
*/
- length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, skb);
-
- /*
- * Initialize URB and send the frame to the device.
- */
- __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
- usb_fill_bulk_urb(priv_tx->urb, usb_dev, usb_sndbulkpipe(usb_dev, 1),
- skb->data, length, rt2x00usb_interrupt_txdone, entry);
- usb_submit_urb(priv_tx->urb, GFP_ATOMIC);
+ length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb);
- rt2x00queue_index_inc(queue, Q_INDEX);
+ usb_fill_bulk_urb(entry_priv->urb, usb_dev,
+ usb_sndbulkpipe(usb_dev, 1),
+ entry->skb->data, length,
+ rt2x00usb_interrupt_txdone, entry);
return 0;
}
EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
-/*
- * RX data handlers.
- */
-static struct sk_buff* rt2x00usb_alloc_rxskb(struct data_queue *queue)
+static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
{
- struct sk_buff *skb;
- unsigned int frame_size;
+ struct queue_entry_priv_usb *entry_priv = entry->priv_data;
+
+ if (__test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags))
+ usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+}
+
+void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
+ const enum data_queue_qid qid)
+{
+ struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid);
+ unsigned long irqflags;
+ unsigned int index;
+ unsigned int index_done;
+ unsigned int i;
/*
- * As alignment we use 2 and not NET_IP_ALIGN because we need
- * to be sure we have 2 bytes room in the head. (NET_IP_ALIGN
- * can be 0 on some hardware). We use these 2 bytes for frame
- * alignment later, we assume that the chance that
- * header_size % 4 == 2 is bigger then header_size % 2 == 0
- * and thus optimize alignment by reserving the 2 bytes in
- * advance.
+ * Only protect the range we are going to loop over,
+ * if during our loop a extra entry is set to pending
+ * it should not be kicked during this run, since it
+ * is part of another TX operation.
*/
- frame_size = queue->data_size + queue->desc_size;
- skb = dev_alloc_skb(queue->desc_size + frame_size + 2);
- if (!skb)
- return NULL;
-
- skb_reserve(skb, queue->desc_size + 2);
- skb_put(skb, frame_size);
+ spin_lock_irqsave(&queue->lock, irqflags);
+ index = queue->index[Q_INDEX];
+ index_done = queue->index[Q_INDEX_DONE];
+ spin_unlock_irqrestore(&queue->lock, irqflags);
- return skb;
+ /*
+ * Start from the TX done pointer, this guarentees that we will
+ * send out all frames in the correct order.
+ */
+ if (index_done < index) {
+ for (i = index_done; i < index; i++)
+ rt2x00usb_kick_tx_entry(&queue->entries[i]);
+ } else {
+ for (i = index_done; i < queue->limit; i++)
+ rt2x00usb_kick_tx_entry(&queue->entries[i]);
+
+ for (i = 0; i < index; i++)
+ rt2x00usb_kick_tx_entry(&queue->entries[i]);
+ }
}
+EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue);
+/*
+ * RX data handlers.
+ */
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 sk_buff *skb;
- struct skb_frame_desc *skbdesc;
- struct rxdone_entry_desc rxdesc;
- int header_size;
+ struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
+ u8 rxd[32];
if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
- !test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
+ !test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
return;
/*
@@ -276,61 +259,22 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
* to be actually valid, or if the urb is signaling
* a problem.
*/
- if (urb->actual_length < entry->queue->desc_size || urb->status)
- goto skip_entry;
-
- /*
- * Fill in skb descriptor
- */
- skbdesc = get_skb_frame_desc(entry->skb);
- memset(skbdesc, 0, sizeof(*skbdesc));
- skbdesc->entry = entry;
-
- memset(&rxdesc, 0, sizeof(rxdesc));
- rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
-
- /*
- * The data behind the ieee80211 header must be
- * aligned on a 4 byte boundary.
- */
- header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
- if (header_size % 4 == 0) {
- skb_push(entry->skb, 2);
- memmove(entry->skb->data, entry->skb->data + 2,
- entry->skb->len - 2);
- skbdesc->data = entry->skb->data;
- skb_trim(entry->skb,entry->skb->len - 2);
+ 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;
}
/*
- * Allocate a new sk buffer to replace the current one.
- * If allocation fails, we should drop the current frame
- * so we can recycle the existing sk buffer for the new frame.
+ * Fill in desc fields of the skb descriptor
*/
- skb = rt2x00usb_alloc_rxskb(entry->queue);
- if (!skb)
- goto skip_entry;
+ skbdesc->desc = rxd;
+ skbdesc->desc_len = entry->queue->desc_size;
/*
* Send the frame to rt2x00lib for further processing.
*/
- rt2x00lib_rxdone(entry, &rxdesc);
-
- /*
- * Replace current entry's skb with the newly allocated one,
- * and reinitialize the urb.
- */
- entry->skb = skb;
- urb->transfer_buffer = entry->skb->data;
- urb->transfer_buffer_length = entry->skb->len;
-
-skip_entry:
- if (test_bit(DEVICE_ENABLED_RADIO, &entry->queue->rt2x00dev->flags)) {
- __set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
- usb_submit_urb(urb, GFP_ATOMIC);
- }
-
- rt2x00queue_index_inc(entry->queue, Q_INDEX);
+ rt2x00lib_rxdone(rt2x00dev, entry);
}
/*
@@ -338,27 +282,21 @@ skip_entry:
*/
void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
- struct queue_entry_priv_usb_rx *priv_rx;
- struct queue_entry_priv_usb_tx *priv_tx;
- struct queue_entry_priv_usb_bcn *priv_bcn;
+ struct queue_entry_priv_usb *entry_priv;
+ struct queue_entry_priv_usb_bcn *bcn_priv;
struct data_queue *queue;
unsigned int i;
- rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0x0000, 0x0000,
+ rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
REGISTER_TIMEOUT);
/*
* Cancel all queues.
*/
- for (i = 0; i < rt2x00dev->rx->limit; i++) {
- priv_rx = rt2x00dev->rx->entries[i].priv_data;
- usb_kill_urb(priv_rx->urb);
- }
-
- tx_queue_for_each(rt2x00dev, queue) {
+ queue_for_each(rt2x00dev, queue) {
for (i = 0; i < queue->limit; i++) {
- priv_tx = queue->entries[i].priv_data;
- usb_kill_urb(priv_tx->urb);
+ entry_priv = queue->entries[i].priv_data;
+ usb_kill_urb(entry_priv->urb);
}
}
@@ -369,19 +307,9 @@ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
return;
for (i = 0; i < rt2x00dev->bcn->limit; i++) {
- priv_bcn = rt2x00dev->bcn->entries[i].priv_data;
- usb_kill_urb(priv_bcn->urb);
-
- if (priv_bcn->guardian_urb)
- usb_kill_urb(priv_bcn->guardian_urb);
- }
-
- if (!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags))
- return;
-
- for (i = 0; i < rt2x00dev->bcn[1].limit; i++) {
- priv_tx = rt2x00dev->bcn[1].entries[i].priv_data;
- usb_kill_urb(priv_tx->urb);
+ bcn_priv = rt2x00dev->bcn->entries[i].priv_data;
+ if (bcn_priv->guardian_urb)
+ usb_kill_urb(bcn_priv->guardian_urb);
}
}
EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
@@ -392,16 +320,16 @@ EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
struct queue_entry *entry)
{
- struct usb_device *usb_dev = rt2x00dev_usb_dev(rt2x00dev);
- struct queue_entry_priv_usb_rx *priv_rx = entry->priv_data;
+ struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
+ struct queue_entry_priv_usb *entry_priv = entry->priv_data;
- usb_fill_bulk_urb(priv_rx->urb, usb_dev,
+ usb_fill_bulk_urb(entry_priv->urb, usb_dev,
usb_rcvbulkpipe(usb_dev, 1),
entry->skb->data, entry->skb->len,
rt2x00usb_interrupt_rxdone, entry);
__set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
- usb_submit_urb(priv_rx->urb, GFP_ATOMIC);
+ usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry);
@@ -415,38 +343,31 @@ EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry);
static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
struct data_queue *queue)
{
- struct queue_entry_priv_usb_rx *priv_rx;
- struct queue_entry_priv_usb_tx *priv_tx;
- struct queue_entry_priv_usb_bcn *priv_bcn;
- struct urb *urb;
- unsigned int guardian =
- test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags);
+ struct queue_entry_priv_usb *entry_priv;
+ struct queue_entry_priv_usb_bcn *bcn_priv;
unsigned int i;
+ for (i = 0; i < queue->limit; i++) {
+ entry_priv = queue->entries[i].priv_data;
+ entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!entry_priv->urb)
+ return -ENOMEM;
+ }
+
/*
- * Allocate the URB's
+ * If this is not the beacon queue or
+ * no guardian byte was required for the beacon,
+ * then we are done.
*/
+ if (rt2x00dev->bcn != queue ||
+ !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
+ return 0;
+
for (i = 0; i < queue->limit; i++) {
- urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!urb)
+ bcn_priv = queue->entries[i].priv_data;
+ bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!bcn_priv->guardian_urb)
return -ENOMEM;
-
- if (queue->qid == QID_RX) {
- priv_rx = queue->entries[i].priv_data;
- priv_rx->urb = urb;
- } else if (queue->qid == QID_MGMT && guardian) {
- priv_bcn = queue->entries[i].priv_data;
- priv_bcn->urb = urb;
-
- urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!urb)
- return -ENOMEM;
-
- priv_bcn->guardian_urb = urb;
- } else {
- priv_tx = queue->entries[i].priv_data;
- priv_tx->urb = urb;
- }
}
return 0;
@@ -455,47 +376,39 @@ static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
struct data_queue *queue)
{
- struct queue_entry_priv_usb_rx *priv_rx;
- struct queue_entry_priv_usb_tx *priv_tx;
- struct queue_entry_priv_usb_bcn *priv_bcn;
- struct urb *urb;
- unsigned int guardian =
- test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags);
+ struct queue_entry_priv_usb *entry_priv;
+ struct queue_entry_priv_usb_bcn *bcn_priv;
unsigned int i;
if (!queue->entries)
return;
for (i = 0; i < queue->limit; i++) {
- if (queue->qid == QID_RX) {
- priv_rx = queue->entries[i].priv_data;
- urb = priv_rx->urb;
- } else if (queue->qid == QID_MGMT && guardian) {
- priv_bcn = queue->entries[i].priv_data;
-
- usb_kill_urb(priv_bcn->guardian_urb);
- usb_free_urb(priv_bcn->guardian_urb);
-
- urb = priv_bcn->urb;
- } else {
- priv_tx = queue->entries[i].priv_data;
- urb = priv_tx->urb;
- }
+ entry_priv = queue->entries[i].priv_data;
+ usb_kill_urb(entry_priv->urb);
+ usb_free_urb(entry_priv->urb);
+ }
- usb_kill_urb(urb);
- usb_free_urb(urb);
- if (queue->entries[i].skb)
- kfree_skb(queue->entries[i].skb);
+ /*
+ * If this is not the beacon queue or
+ * no guardian byte was required for the beacon,
+ * then we are done.
+ */
+ if (rt2x00dev->bcn != queue ||
+ !test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
+ return;
+
+ for (i = 0; i < queue->limit; i++) {
+ bcn_priv = queue->entries[i].priv_data;
+ usb_kill_urb(bcn_priv->guardian_urb);
+ usb_free_urb(bcn_priv->guardian_urb);
}
}
int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
{
struct data_queue *queue;
- struct sk_buff *skb;
- unsigned int entry_size;
- unsigned int i;
- int uninitialized_var(status);
+ int status;
/*
* Allocate DMA
@@ -506,18 +419,6 @@ int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
goto exit;
}
- /*
- * For the RX queue, skb's should be allocated.
- */
- entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size;
- for (i = 0; i < rt2x00dev->rx->limit; i++) {
- skb = rt2x00usb_alloc_rxskb(rt2x00dev->rx);
- if (!skb)
- goto exit;
-
- rt2x00dev->rx->entries[i].skb = skb;
- }
-
return 0;
exit:
@@ -596,7 +497,7 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
usb_set_intfdata(usb_intf, hw);
rt2x00dev = hw->priv;
- rt2x00dev->dev = usb_intf;
+ rt2x00dev->dev = &usb_intf->dev;
rt2x00dev->ops = ops;
rt2x00dev->hw = hw;
mutex_init(&rt2x00dev->usb_cache_mutex);