From: Christian Lamparter Date: Sat, 13 Dec 2008 13:14:20 +0000 (+0100) Subject: p54: move statistic timer update routine into a workqueue X-Git-Tag: v2.6.29-rc1~581^2~105^2~36 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=54fdb040b4760d5b2994d15c1371e297679420e9;p=~emulex%2Finfiniband.git p54: move statistic timer update routine into a workqueue This patch moves a good chunk of code from the former statistic update timer routine into a workqueue, which is kindly provided by mac80211. Also as a nice side-effect we can lay the foundation for other essential housekeeping features we want to do in the future. e.g: - drain the (clogged) tx_queue. - initiate bursts. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h index d2dbb9e15d9..23b80ef4d01 100644 --- a/drivers/net/wireless/p54/p54.h +++ b/drivers/net/wireless/p54/p54.h @@ -71,6 +71,7 @@ struct p54_edcf_queue_param { #define FW_LM20 0x4c4d3230 struct p54_common { + struct ieee80211_hw *hw; u32 rx_start; u32 rx_end; struct sk_buff_head tx_queue; @@ -106,9 +107,7 @@ struct p54_common { struct ieee80211_tx_queue_stats tx_stats[8]; struct p54_edcf_queue_param qos_params[8]; struct ieee80211_low_level_stats stats; - struct timer_list stats_timer; - struct completion stats_comp; - struct sk_buff *cached_stats; + struct delayed_work work; struct sk_buff *cached_beacon; int noise; void *eeprom; diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index a4e99b02af0..36310f88187 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -589,6 +589,9 @@ static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb) ieee80211_rx_irqsafe(dev, skb, &rx_status); + queue_delayed_work(dev->workqueue, &priv->work, + msecs_to_jiffies(P54_STATISTICS_UPDATE)); + return -1; } @@ -652,6 +655,27 @@ void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) } EXPORT_SYMBOL_GPL(p54_free_skb); +static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev, + __le32 req_id) +{ + struct p54_common *priv = dev->priv; + struct sk_buff *entry = priv->tx_queue.next; + unsigned long flags; + + spin_lock_irqsave(&priv->tx_queue.lock, flags); + while (entry != (struct sk_buff *)&priv->tx_queue) { + struct p54_hdr *hdr = (struct p54_hdr *) entry->data; + + if (hdr->req_id == req_id) { + spin_unlock_irqrestore(&priv->tx_queue.lock, flags); + return entry; + } + entry = entry->next; + } + spin_unlock_irqrestore(&priv->tx_queue.lock, flags); + return NULL; +} + static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_common *priv = dev->priv; @@ -775,8 +799,12 @@ static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb) struct p54_common *priv = dev->priv; struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_statistics *stats = (struct p54_statistics *) hdr->data; - u32 tsf32 = le32_to_cpu(stats->tsf32); + u32 tsf32; + + if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) + return ; + tsf32 = le32_to_cpu(stats->tsf32); if (tsf32 < priv->tsf_low32) priv->tsf_high32++; priv->tsf_low32 = tsf32; @@ -786,9 +814,8 @@ static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb) priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs); priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise)); - complete(&priv->stats_comp); - mod_timer(&priv->stats_timer, jiffies + 5 * HZ); + p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id)); } static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb) @@ -897,6 +924,8 @@ static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb, * have a few spare slots for control frames left. */ ieee80211_stop_queues(dev); + queue_delayed_work(dev->workqueue, &priv->work, + msecs_to_jiffies(P54_TX_TIMEOUT)); if (unlikely(left == 32)) { /* @@ -1354,6 +1383,10 @@ static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb) if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len))) goto err; priv->tx(dev, skb, 0); + + queue_delayed_work(dev->workqueue, &priv->work, + msecs_to_jiffies(P54_TX_FRAME_LIFETIME)); + return 0; err: @@ -1579,20 +1612,6 @@ static int p54_set_edcf(struct ieee80211_hw *dev) return 0; } -static int p54_init_stats(struct ieee80211_hw *dev) -{ - struct p54_common *priv = dev->priv; - - priv->cached_stats = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, - sizeof(struct p54_hdr) + sizeof(struct p54_statistics), - P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL); - if (!priv->cached_stats) - return -ENOMEM; - - mod_timer(&priv->stats_timer, jiffies + HZ); - return 0; -} - static int p54_beacon_tim(struct sk_buff *skb) { /* @@ -1684,9 +1703,6 @@ static int p54_start(struct ieee80211_hw *dev) P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); err = p54_set_edcf(dev); - if (err) - goto out; - err = p54_init_stats(dev); if (err) goto out; @@ -1698,6 +1714,8 @@ static int p54_start(struct ieee80211_hw *dev) goto out; } + queue_delayed_work(dev->workqueue, &priv->work, 0); + out: mutex_unlock(&priv->conf_mutex); return err; @@ -1710,9 +1728,7 @@ static void p54_stop(struct ieee80211_hw *dev) mutex_lock(&priv->conf_mutex); priv->mode = NL80211_IFTYPE_UNSPECIFIED; - del_timer(&priv->stats_timer); - p54_free_skb(dev, priv->cached_stats); - priv->cached_stats = NULL; + cancel_delayed_work_sync(&priv->work); if (priv->cached_beacon) p54_tx_cancel(dev, priv->cached_beacon); @@ -1889,14 +1905,29 @@ static int p54_init_xbow_synth(struct ieee80211_hw *dev) return 0; } -static void p54_statistics_timer(unsigned long data) +static void p54_work(struct work_struct *work) { - struct ieee80211_hw *dev = (struct ieee80211_hw *) data; - struct p54_common *priv = dev->priv; + struct p54_common *priv = container_of(work, struct p54_common, + work.work); + struct ieee80211_hw *dev = priv->hw; + struct sk_buff *skb; + + if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) + return ; + + /* + * TODO: walk through tx_queue and do the following tasks + * 1. initiate bursts. + * 2. cancel stuck frames / reset the device if necessary. + */ - BUG_ON(!priv->cached_stats); + skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) + + sizeof(struct p54_statistics), + P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL); + if (!skb) + return ; - priv->tx(dev, priv->cached_stats, 0); + priv->tx(dev, skb, 0); } static int p54_get_stats(struct ieee80211_hw *dev, @@ -1904,17 +1935,7 @@ static int p54_get_stats(struct ieee80211_hw *dev, { struct p54_common *priv = dev->priv; - del_timer(&priv->stats_timer); - p54_statistics_timer((unsigned long)dev); - - if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) { - printk(KERN_ERR "%s: device does not respond!\n", - wiphy_name(dev->wiphy)); - return -EBUSY; - } - memcpy(stats, &priv->stats, sizeof(*stats)); - return 0; } @@ -2072,6 +2093,7 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len) return NULL; priv = dev->priv; + priv->hw = dev; priv->mode = NL80211_IFTYPE_UNSPECIFIED; priv->basic_rate_mask = 0x15f; skb_queue_head_init(&priv->tx_queue); @@ -2107,9 +2129,7 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len) mutex_init(&priv->conf_mutex); init_completion(&priv->eeprom_comp); - init_completion(&priv->stats_comp); - setup_timer(&priv->stats_timer, p54_statistics_timer, - (unsigned long)dev); + INIT_DELAYED_WORK(&priv->work, p54_work); return dev; } @@ -2118,8 +2138,6 @@ EXPORT_SYMBOL_GPL(p54_init_common); void p54_free_common(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; - del_timer(&priv->stats_timer); - kfree_skb(priv->cached_stats); kfree(priv->iq_autocal); kfree(priv->output_limit); kfree(priv->curve_data); diff --git a/drivers/net/wireless/p54/p54common.h b/drivers/net/wireless/p54/p54common.h index 5a68fdae773..06e1643cc29 100644 --- a/drivers/net/wireless/p54/p54common.h +++ b/drivers/net/wireless/p54/p54common.h @@ -355,6 +355,11 @@ struct p54_tx_data { u8 align[0]; } __attribute__ ((packed)); +/* unit is ms */ +#define P54_TX_FRAME_LIFETIME 2000 +#define P54_TX_TIMEOUT 4000 +#define P54_STATISTICS_UPDATE 5000 + #define P54_FILTER_TYPE_NONE 0 #define P54_FILTER_TYPE_STATION BIT(0) #define P54_FILTER_TYPE_IBSS BIT(1)