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rt2x00: Make rt2x00_queue_entry_for_each more flexible

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Allow passing a void pointer to rt2x00_queue_entry_for_each which in
turn in provided to the callback function.

Furthermore, allow the callback function to stop processing by returning
true. And also notify the caller of rt2x00_queue_entry_for_each if the
loop was canceled by the callback.

No functional changes, just preparation for an upcoming patch.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Helmut Schaa 2011-04-18 15:27:43 +02:00 committed by John W. Linville
parent 7dab73b37f
commit 10e11568ca
3 changed files with 49 additions and 21 deletions
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28
drivers/net/wireless/rt2x00/rt2x00queue.c
View file

@ -650,10 +650,12 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
return ret;
}
void rt2x00queue_for_each_entry(struct data_queue *queue,
bool rt2x00queue_for_each_entry(struct data_queue *queue,
enum queue_index start,
enum queue_index end,
void (*fn)(struct queue_entry *entry))
void *data,
bool (*fn)(struct queue_entry *entry,
void *data))
{
unsigned long irqflags;
unsigned int index_start;
@ -664,7 +666,7 @@ void rt2x00queue_for_each_entry(struct data_queue *queue,
ERROR(queue->rt2x00dev,
"Entry requested from invalid index range (%d - %d)\n",
start, end);
return;
return true;
}
/*
@ -683,15 +685,23 @@ void rt2x00queue_for_each_entry(struct data_queue *queue,
* send out all frames in the correct order.
*/
if (index_start < index_end) {
for (i = index_start; i < index_end; i++)
fn(&queue->entries[i]);
for (i = index_start; i < index_end; i++) {
if (fn(&queue->entries[i], data))
return true;
}
} else {
for (i = index_start; i < queue->limit; i++)
fn(&queue->entries[i]);
for (i = index_start; i < queue->limit; i++) {
if (fn(&queue->entries[i], data))
return true;
}
for (i = 0; i < index_end; i++)
fn(&queue->entries[i]);
for (i = 0; i < index_end; i++) {
if (fn(&queue->entries[i], data))
return true;
}
}
return false;
}
EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry);

10
drivers/net/wireless/rt2x00/rt2x00queue.h
View file

@ -580,16 +580,22 @@ struct data_queue_desc {
* @queue: Pointer to @data_queue
* @start: &enum queue_index Pointer to start index
* @end: &enum queue_index Pointer to end index
* @data: Data to pass to the callback function
* @fn: The function to call for each &struct queue_entry
*
* This will walk through all entries in the queue, in chronological
* order. This means it will start at the current @start pointer
* and will walk through the queue until it reaches the @end pointer.
*
* If fn returns true for an entry rt2x00queue_for_each_entry will stop
* processing and return true as well.
*/
void rt2x00queue_for_each_entry(struct data_queue *queue,
bool rt2x00queue_for_each_entry(struct data_queue *queue,
enum queue_index start,
enum queue_index end,
void (*fn)(struct queue_entry *entry));
void *data,
bool (*fn)(struct queue_entry *entry,
void *data));
/**
* rt2x00queue_empty - Check if the queue is empty.

32
drivers/net/wireless/rt2x00/rt2x00usb.c
View file

@ -230,7 +230,7 @@ static void rt2x00usb_interrupt_txdone(struct urb *urb)
queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
}
static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void* data)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
@ -240,7 +240,7 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
return;
return true;
/*
* USB devices cannot blindly pass the skb->len as the
@ -261,6 +261,8 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
return false;
}
/*
@ -323,7 +325,7 @@ static void rt2x00usb_interrupt_rxdone(struct urb *urb)
queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
}
static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void* data)
{
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
@ -332,7 +334,7 @@ static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
return;
return true;
rt2x00lib_dmastart(entry);
@ -348,6 +350,8 @@ static void rt2x00usb_kick_rx_entry(struct queue_entry *entry)
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
return false;
}
void rt2x00usb_kick_queue(struct data_queue *queue)
@ -358,12 +362,18 @@ void rt2x00usb_kick_queue(struct data_queue *queue)
case QID_AC_BE:
case QID_AC_BK:
if (!rt2x00queue_empty(queue))
rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
rt2x00queue_for_each_entry(queue,
Q_INDEX_DONE,
Q_INDEX,
NULL,
rt2x00usb_kick_tx_entry);
break;
case QID_RX:
if (!rt2x00queue_full(queue))
rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX,
rt2x00queue_for_each_entry(queue,
Q_INDEX_DONE,
Q_INDEX,
NULL,
rt2x00usb_kick_rx_entry);
break;
default:
@ -372,14 +382,14 @@ void rt2x00usb_kick_queue(struct data_queue *queue)
}
EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
static void rt2x00usb_flush_entry(struct queue_entry *entry)
static bool rt2x00usb_flush_entry(struct queue_entry *entry, void* data)
{
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;
return true;
usb_kill_urb(entry_priv->urb);
@ -389,6 +399,8 @@ static void rt2x00usb_flush_entry(struct queue_entry *entry)
if ((entry->queue->qid == QID_BEACON) &&
(test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)))
usb_kill_urb(bcn_priv->guardian_urb);
return false;
}
void rt2x00usb_flush_queue(struct data_queue *queue)
@ -396,7 +408,7 @@ 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,
rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
rt2x00usb_flush_entry);
/*
@ -489,7 +501,7 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
entry->flags = 0;
if (entry->queue->qid == QID_RX)
rt2x00usb_kick_rx_entry(entry);
rt2x00usb_kick_rx_entry(entry, NULL);
}
EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);