ar9170: simplify & deBUG tx_status queueing and reporting

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@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2009-03-23 12:15:43 +01:00 committed by John W. Linville
parent 04de838159
commit 4a48e2a484
3 changed files with 49 additions and 103 deletions

View file

@ -159,7 +159,7 @@ struct ar9170 {
}; };
struct ar9170_sta_info { 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) #define IS_STARTED(a) (a->state >= AR9170_STARTED)

View file

@ -397,10 +397,21 @@ struct ar9170_cmd_response {
}; };
} __packed; } __packed;
/* QoS */
/* mac80211 queue to HW/FW map */ /* mac80211 queue to HW/FW map */
static const u8 ar9170_qos_hwmap[4] = { 3, 2, 0, 1 }; static const u8 ar9170_qos_hwmap[4] = { 3, 2, 0, 1 };
/* HW/FW queue to mac80211 map */ /* HW/FW queue to mac80211 map */
static const u8 ar9170_qos_mac80211map[4] = { 2, 3, 1, 0 }; 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 */ #endif /* __AR9170_HW_H */

View file

@ -277,54 +277,6 @@ static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar,
return NULL; 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, static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
const u32 queue) const u32 queue)
{ {
@ -344,21 +296,21 @@ static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
if (likely(sta)) { if (likely(sta)) {
struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv; struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv;
skb = ar9170_find_skb_in_queue_by_txcq(ar, queue, skb = skb_dequeue(&sta_priv->tx_status[queue]);
&sta_priv->tx_status); rcu_read_unlock();
} else { if (likely(skb))
/* STA is not in database (yet/anymore). */ 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, skb = ar9170_find_skb_in_queue(ar, mac, queue,
&ar->global_tx_status_waste); &ar->global_tx_status);
if (!skb) {
/* so it still _must_ be in the global list. */
skb = ar9170_find_skb_in_queue(ar, mac, queue,
&ar->global_tx_status);
}
} }
rcu_read_unlock();
#ifdef AR9170_QUEUE_DEBUG #ifdef AR9170_QUEUE_DEBUG
if (unlikely((!skb) && net_ratelimit())) { 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); wiphy_name(ar->hw->wiphy), mac, queue);
} }
#endif /* AR9170_QUEUE_DEBUG */ #endif /* AR9170_QUEUE_DEBUG */
return skb; 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) static void ar9170_tx_status_janitor(struct work_struct *work)
{ {
struct ar9170 *ar = container_of(work, struct ar9170, struct ar9170 *ar = container_of(work, struct ar9170,
filter_config_work); tx_status_janitor.work);
struct sk_buff *skb; struct sk_buff *skb;
if (unlikely(!IS_STARTED(ar)))
return ;
mutex_lock(&ar->mutex);
/* recycle the garbage back to mac80211... one by one. */ /* recycle the garbage back to mac80211... one by one. */
while ((skb = skb_dequeue(&ar->global_tx_status_waste))) { while ((skb = skb_dequeue(&ar->global_tx_status_waste))) {
#ifdef AR9170_QUEUE_DEBUG #ifdef AR9170_QUEUE_DEBUG
@ -395,8 +350,6 @@ static void ar9170_tx_status_janitor(struct work_struct *work)
AR9170_TX_STATUS_FAILED); AR9170_TX_STATUS_FAILED);
} }
while ((skb = skb_dequeue(&ar->global_tx_status))) { while ((skb = skb_dequeue(&ar->global_tx_status))) {
#ifdef AR9170_QUEUE_DEBUG #ifdef AR9170_QUEUE_DEBUG
printk(KERN_DEBUG "%s: moving frame into waste queue =>\n", 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) if (skb_queue_len(&ar->global_tx_status_waste) > 0)
queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor, queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
msecs_to_jiffies(100)); msecs_to_jiffies(100));
mutex_unlock(&ar->mutex);
} }
static void ar9170_handle_command_response(struct ar9170 *ar, 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) { if (info->control.sta) {
sta_info = (void *) info->control.sta->drv_priv; 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 { } else {
skb_queue_tail(&ar->global_tx_status, skb); 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); err = ar->tx(ar, skb, tx_status, 0);
if (unlikely(tx_status && err)) { if (unlikely(tx_status && err)) {
if (info->control.sta) if (info->control.sta)
skb_unlink(skb, &sta_info->tx_status); skb_unlink(skb, &sta_info->tx_status[queue]);
else else
skb_unlink(skb, &ar->global_tx_status); 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 *ar = hw->priv;
struct ar9170_sta_info *info = (void *) sta->drv_priv; struct ar9170_sta_info *info = (void *) sta->drv_priv;
struct sk_buff *skb; struct sk_buff *skb;
unsigned int i;
switch (cmd) { switch (cmd) {
case STA_NOTIFY_ADD: case STA_NOTIFY_ADD:
skb_queue_head_init(&info->tx_status); for (i = 0; i < ar->hw->queues; i++)
skb_queue_head_init(&info->tx_status[i]);
/*
* 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 */
break; break;
case STA_NOTIFY_REMOVE: case STA_NOTIFY_REMOVE:
/* /*
* transfer all outstanding frames that need a tx_status * 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 #ifdef AR9170_QUEUE_DEBUG
printk(KERN_DEBUG "%s: queueing frame in global " printk(KERN_DEBUG "%s: queueing frame in "
"tx_status queue =>\n", "global tx_status queue =>\n",
wiphy_name(ar->hw->wiphy)); wiphy_name(ar->hw->wiphy));
ar9170_print_txheader(ar, skb); ar9170_print_txheader(ar, skb);
#endif /* AR9170_QUEUE_DEBUG */ #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; break;
default: default:
@ -1571,7 +1506,7 @@ static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
int ret; int ret;
mutex_lock(&ar->mutex); mutex_lock(&ar->mutex);
if ((param) && !(queue > 4)) { if ((param) && !(queue > ar->hw->queues)) {
memcpy(&ar->edcf[ar9170_qos_hwmap[queue]], memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
param, sizeof(*param)); param, sizeof(*param));
@ -1635,7 +1570,7 @@ void *ar9170_alloc(size_t priv_size)
IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM; IEEE80211_HW_NOISE_DBM;
ar->hw->queues = 4; ar->hw->queues = __AR9170_NUM_TXQ;
ar->hw->extra_tx_headroom = 8; ar->hw->extra_tx_headroom = 8;
ar->hw->sta_data_size = sizeof(struct ar9170_sta_info); ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);