From 4a48e2a484e5cf99da4795cf2d6916e057d533ad Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Mon, 23 Mar 2009 12:15:43 +0100 Subject: 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 Signed-off-by: John W. Linville --- drivers/net/wireless/ar9170/ar9170.h | 2 +- drivers/net/wireless/ar9170/hw.h | 11 +++ drivers/net/wireless/ar9170/main.c | 139 ++++++++++------------------------- 3 files changed, 49 insertions(+), 103 deletions(-) diff --git a/drivers/net/wireless/ar9170/ar9170.h b/drivers/net/wireless/ar9170/ar9170.h index c49d7138d57..f4fb2e94aea 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 ad205f82f60..13091bd9d81 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 a3b5323743c..f8c2357a173 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); -- cgit v1.2.3