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path: root/drivers/net/wireless/rt2x00/rt2x00queue.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2x00queue.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2x00queue.c90
1 files changed, 55 insertions, 35 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index 20dbdd6fb904..a3401d301058 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -100,21 +100,8 @@ void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
{
struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
- /*
- * If device has requested headroom, we should make sure that
- * is also mapped to the DMA so it can be used for transfering
- * additional descriptor information to the hardware.
- */
- skb_push(skb, rt2x00dev->ops->extra_tx_headroom);
-
skbdesc->skb_dma =
dma_map_single(rt2x00dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
-
- /*
- * Restore data pointer to original location again.
- */
- skb_pull(skb, rt2x00dev->ops->extra_tx_headroom);
-
skbdesc->flags |= SKBDESC_DMA_MAPPED_TX;
}
EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb);
@@ -130,16 +117,12 @@ void rt2x00queue_unmap_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
}
if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) {
- /*
- * Add headroom to the skb length, it has been removed
- * by the driver, but it was actually mapped to DMA.
- */
- dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma,
- skb->len + rt2x00dev->ops->extra_tx_headroom,
+ dma_unmap_single(rt2x00dev->dev, skbdesc->skb_dma, skb->len,
DMA_TO_DEVICE);
skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX;
}
}
+EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb);
void rt2x00queue_free_skb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb)
{
@@ -370,13 +353,18 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
/*
* Check if more fragments are pending
*/
- if (ieee80211_has_morefrags(hdr->frame_control) ||
- (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES)) {
+ if (ieee80211_has_morefrags(hdr->frame_control)) {
__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
__set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags);
}
/*
+ * Check if more frames (!= fragments) are pending
+ */
+ if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES)
+ __set_bit(ENTRY_TXD_BURST, &txdesc->flags);
+
+ /*
* Beacons and probe responses require the tsf timestamp
* to be inserted into the frame, except for a frame that has been injected
* through a monitor interface. This latter is needed for testing a
@@ -416,12 +404,51 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry,
rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate);
}
+static int rt2x00queue_write_tx_data(struct queue_entry *entry,
+ struct txentry_desc *txdesc)
+{
+ struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
+
+ /*
+ * This should not happen, we already checked the entry
+ * was ours. When the hardware disagrees there has been
+ * a queue corruption!
+ */
+ if (unlikely(rt2x00dev->ops->lib->get_entry_state &&
+ rt2x00dev->ops->lib->get_entry_state(entry))) {
+ ERROR(rt2x00dev,
+ "Corrupt queue %d, accessing entry which is not ours.\n"
+ "Please file bug report to %s.\n",
+ entry->queue->qid, DRV_PROJECT);
+ return -EINVAL;
+ }
+
+ /*
+ * Add the requested extra tx headroom in front of the skb.
+ */
+ skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom);
+ memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom);
+
+ /*
+ * Call the driver's write_tx_data function, if it exists.
+ */
+ if (rt2x00dev->ops->lib->write_tx_data)
+ rt2x00dev->ops->lib->write_tx_data(entry, txdesc);
+
+ /*
+ * Map the skb to DMA.
+ */
+ if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
+ rt2x00queue_map_txskb(rt2x00dev, entry->skb);
+
+ return 0;
+}
+
static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
struct txentry_desc *txdesc)
{
struct data_queue *queue = entry->queue;
struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
- enum rt2x00_dump_type dump_type;
rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, entry->skb, txdesc);
@@ -429,9 +456,7 @@ static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
* All processing on the frame has been completed, this means
* it is now ready to be dumped to userspace through debugfs.
*/
- dump_type = (txdesc->queue == QID_BEACON) ?
- DUMP_FRAME_BEACON : DUMP_FRAME_TX;
- rt2x00debug_dump_frame(rt2x00dev, dump_type, entry->skb);
+ rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, entry->skb);
}
static void rt2x00queue_kick_tx_queue(struct queue_entry *entry,
@@ -530,16 +555,12 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
* call failed. Since we always return NETDEV_TX_OK to mac80211,
* this frame will simply be dropped.
*/
- if (unlikely(queue->rt2x00dev->ops->lib->write_tx_data(entry,
- &txdesc))) {
+ if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) {
clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
entry->skb = NULL;
return -EIO;
}
- if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags))
- rt2x00queue_map_txskb(queue->rt2x00dev, skb);
-
set_bit(ENTRY_DATA_PENDING, &entry->flags);
rt2x00queue_index_inc(queue, Q_INDEX);
@@ -595,11 +616,6 @@ int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
skbdesc->entry = intf->beacon;
/*
- * Write TX descriptor into reserved room in front of the beacon.
- */
- rt2x00queue_write_tx_descriptor(intf->beacon, &txdesc);
-
- /*
* Send beacon to hardware and enable beacon genaration..
*/
rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc);
@@ -672,9 +688,11 @@ void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index)
if (index == Q_INDEX) {
queue->length++;
+ queue->last_index = jiffies;
} else if (index == Q_INDEX_DONE) {
queue->length--;
queue->count++;
+ queue->last_index_done = jiffies;
}
spin_unlock_irqrestore(&queue->lock, irqflags);
@@ -688,6 +706,8 @@ static void rt2x00queue_reset(struct data_queue *queue)
queue->count = 0;
queue->length = 0;
+ queue->last_index = jiffies;
+ queue->last_index_done = jiffies;
memset(queue->index, 0, sizeof(queue->index));
spin_unlock_irqrestore(&queue->lock, irqflags);