This patch simplifies the tx_status report code by using four tx_queues per
station instead of only one. (the skb lookup should be in O(1) now :-p ).
Also, it fixes a really obvious copy&paste bug in the janitor work code and
adds back a few spilled bits to the hardware definition header about QoS.
Signed-off-by: Christian Lamparter <chunkeey@xxxxxx>
---
Alina, does the driver - with this patch - still cause freeze/crash/hangs?
Regards,
Chr
---
diff --git a/drivers/net/wireless/ar9170/ar9170.h b/drivers/net/wireless/ar9170/ar9170.h
index c49d713..f4fb2e9 100644
--- a/drivers/net/wireless/ar9170/ar9170.h
+++ b/drivers/net/wireless/ar9170/ar9170.h
@@ -159,7 +159,7 @@ struct ar9170 {
};
struct ar9170_sta_info {
- struct sk_buff_head tx_status;
+ struct sk_buff_head tx_status[__AR9170_NUM_TXQ];
};
#define IS_STARTED(a) (a->state >= AR9170_STARTED)
diff --git a/drivers/net/wireless/ar9170/hw.h b/drivers/net/wireless/ar9170/hw.h
index ad205f8..231d347 100644
--- a/drivers/net/wireless/ar9170/hw.h
+++ b/drivers/net/wireless/ar9170/hw.h
@@ -397,10 +397,21 @@ struct ar9170_cmd_response {
};
} __packed;
+/* QoS */
+
/* mac80211 queue to HW/FW map */
static const u8 ar9170_qos_hwmap[4] = { 3, 2, 0, 1 };
/* HW/FW queue to mac80211 map */
static const u8 ar9170_qos_mac80211map[4] = { 2, 3, 1, 0 };
+enum ar9170_txq {
+ AR9170_TXQ_BE,
+ AR9170_TXQ_BK,
+ AR9170_TXQ_VI,
+ AR9170_TXQ_VO,
+
+ __AR9170_NUM_TXQ,
+};
+
#endif /* __AR9170_HW_H */
diff --git a/drivers/net/wireless/ar9170/main.c b/drivers/net/wireless/ar9170/main.c
index a3b5323..f8c2357 100644
--- a/drivers/net/wireless/ar9170/main.c
+++ b/drivers/net/wireless/ar9170/main.c
@@ -277,54 +277,6 @@ static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar,
return NULL;
}
-static struct sk_buff *ar9170_find_skb_in_queue_by_mac(struct ar9170 *ar,
- const u8 *mac,
- struct sk_buff_head *q)
-{
- unsigned long flags;
- struct sk_buff *skb;
-
- spin_lock_irqsave(&q->lock, flags);
- skb_queue_walk(q, skb) {
- struct ar9170_tx_control *txc = (void *) skb->data;
- struct ieee80211_hdr *hdr = (void *) txc->frame_data;
-
- if (compare_ether_addr(ieee80211_get_DA(hdr), mac))
- continue;
-
- __skb_unlink(skb, q);
- spin_unlock_irqrestore(&q->lock, flags);
- return skb;
- }
- spin_unlock_irqrestore(&q->lock, flags);
- return NULL;
-}
-
-static struct sk_buff *ar9170_find_skb_in_queue_by_txcq(struct ar9170 *ar,
- const u32 queue,
- struct sk_buff_head *q)
-{
- unsigned long flags;
- struct sk_buff *skb;
-
- spin_lock_irqsave(&q->lock, flags);
- skb_queue_walk(q, skb) {
- struct ar9170_tx_control *txc = (void *) skb->data;
- u32 txc_queue = (le32_to_cpu(txc->phy_control) &
- AR9170_TX_PHY_QOS_MASK) >>
- AR9170_TX_PHY_QOS_SHIFT;
-
- if (queue != txc_queue)
- continue;
-
- __skb_unlink(skb, q);
- spin_unlock_irqrestore(&q->lock, flags);
- return skb;
- }
- spin_unlock_irqrestore(&q->lock, flags);
- return NULL;
-}
-
static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
const u32 queue)
{
@@ -344,21 +296,21 @@ static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
if (likely(sta)) {
struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv;
- skb = ar9170_find_skb_in_queue_by_txcq(ar, queue,
- &sta_priv->tx_status);
- } else {
- /* STA is not in database (yet/anymore). */
+ skb = skb_dequeue(&sta_priv->tx_status[queue]);
+ rcu_read_unlock();
+ if (likely(skb))
+ return skb;
+ } else
+ rcu_read_unlock();
- /* scan the waste bin for likely candidates */
+ /* scan the waste queue for candidates */
+ skb = ar9170_find_skb_in_queue(ar, mac, queue,
+ &ar->global_tx_status_waste);
+ if (!skb) {
+ /* so it still _must_ be in the global list. */
skb = ar9170_find_skb_in_queue(ar, mac, queue,
- &ar->global_tx_status_waste);
- if (!skb) {
- /* so it still _must_ be in the global list. */
- skb = ar9170_find_skb_in_queue(ar, mac, queue,
- &ar->global_tx_status);
- }
+ &ar->global_tx_status);
}
- rcu_read_unlock();
#ifdef AR9170_QUEUE_DEBUG
if (unlikely((!skb) && net_ratelimit())) {
@@ -367,7 +319,6 @@ static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
wiphy_name(ar->hw->wiphy), mac, queue);
}
#endif /* AR9170_QUEUE_DEBUG */
-
return skb;
}
@@ -381,9 +332,13 @@ static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
static void ar9170_tx_status_janitor(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170,
- filter_config_work);
+ tx_status_janitor.work);
struct sk_buff *skb;
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ mutex_lock(&ar->mutex);
/* recycle the garbage back to mac80211... one by one. */
while ((skb = skb_dequeue(&ar->global_tx_status_waste))) {
#ifdef AR9170_QUEUE_DEBUG
@@ -395,8 +350,6 @@ static void ar9170_tx_status_janitor(struct work_struct *work)
AR9170_TX_STATUS_FAILED);
}
-
-
while ((skb = skb_dequeue(&ar->global_tx_status))) {
#ifdef AR9170_QUEUE_DEBUG
printk(KERN_DEBUG "%s: moving frame into waste queue =>\n",
@@ -411,6 +364,8 @@ static void ar9170_tx_status_janitor(struct work_struct *work)
if (skb_queue_len(&ar->global_tx_status_waste) > 0)
queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
msecs_to_jiffies(100));
+
+ mutex_unlock(&ar->mutex);
}
static void ar9170_handle_command_response(struct ar9170 *ar,
@@ -1012,7 +967,7 @@ int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
if (info->control.sta) {
sta_info = (void *) info->control.sta->drv_priv;
- skb_queue_tail(&sta_info->tx_status, skb);
+ skb_queue_tail(&sta_info->tx_status[queue], skb);
} else {
skb_queue_tail(&ar->global_tx_status, skb);
@@ -1025,7 +980,7 @@ int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
err = ar->tx(ar, skb, tx_status, 0);
if (unlikely(tx_status && err)) {
if (info->control.sta)
- skb_unlink(skb, &sta_info->tx_status);
+ skb_unlink(skb, &sta_info->tx_status[queue]);
else
skb_unlink(skb, &ar->global_tx_status);
}
@@ -1479,55 +1434,35 @@ static void ar9170_sta_notify(struct ieee80211_hw *hw,
struct ar9170 *ar = hw->priv;
struct ar9170_sta_info *info = (void *) sta->drv_priv;
struct sk_buff *skb;
+ unsigned int i;
switch (cmd) {
case STA_NOTIFY_ADD:
- skb_queue_head_init(&info->tx_status);
-
- /*
- * do we already have a frame that needs tx_status
- * from this station in our queue?
- * If so then transfer them to the new station queue.
- */
-
- /* preserve the correct order - check the waste bin first */
- while ((skb = ar9170_find_skb_in_queue_by_mac(ar, sta->addr,
- &ar->global_tx_status_waste)))
- skb_queue_tail(&info->tx_status, skb);
-
- /* now the still pending frames */
- while ((skb = ar9170_find_skb_in_queue_by_mac(ar, sta->addr,
- &ar->global_tx_status)))
- skb_queue_tail(&info->tx_status, skb);
-
-#ifdef AR9170_QUEUE_DEBUG
- printk(KERN_DEBUG "%s: STA[%pM] has %d queued frames =>\n",
- wiphy_name(ar->hw->wiphy), sta->addr,
- skb_queue_len(&info->tx_status));
-
- ar9170_dump_station_tx_status_queue(ar, &info->tx_status);
-#endif /* AR9170_QUEUE_DEBUG */
-
-
+ for (i = 0; i < ar->hw->queues; i++)
+ skb_queue_head_init(&info->tx_status[i]);
break;
case STA_NOTIFY_REMOVE:
/*
* transfer all outstanding frames that need a tx_status
- * reports to the fallback queue
+ * reports to the global tx_status queue
*/
- while ((skb = skb_dequeue(&ar->global_tx_status))) {
+ for (i = 0; i < ar->hw->queues; i++) {
+ while ((skb = skb_dequeue(&info->tx_status[i]))) {
#ifdef AR9170_QUEUE_DEBUG
- printk(KERN_DEBUG "%s: queueing frame in global "
- "tx_status queue =>\n",
- wiphy_name(ar->hw->wiphy));
+ printk(KERN_DEBUG "%s: queueing frame in "
+ "global tx_status queue =>\n",
+ wiphy_name(ar->hw->wiphy));
- ar9170_print_txheader(ar, skb);
+ ar9170_print_txheader(ar, skb);
#endif /* AR9170_QUEUE_DEBUG */
- skb_queue_tail(&ar->global_tx_status_waste, skb);
+ skb_queue_tail(&ar->global_tx_status, skb);
+ }
}
+ queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
+ msecs_to_jiffies(100));
break;
default:
@@ -1571,7 +1506,7 @@ static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
int ret;
mutex_lock(&ar->mutex);
- if ((param) && !(queue > 4)) {
+ if ((param) && !(queue > ar->hw->queues)) {
memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
param, sizeof(*param));
@@ -1635,7 +1570,7 @@ void *ar9170_alloc(size_t priv_size)
IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM;
- ar->hw->queues = 4;
+ ar->hw->queues = __AR9170_NUM_TXQ;
ar->hw->extra_tx_headroom = 8;
ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
