.ht_cap = AR9170_HT_CAP,
};
-#ifdef AR9170_QUEUE_DEBUG
-/*
- * In case some wants works with AR9170's crazy tx_status queueing techniques.
- * He might need this rather useful probing function.
- *
- * NOTE: caller must hold the queue's spinlock!
- */
+static void ar9170_tx(struct ar9170 *ar);
+#ifdef AR9170_QUEUE_DEBUG
static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
{
struct ar9170_tx_control *txc = (void *) skb->data;
- struct ieee80211_hdr *hdr = (void *)txc->frame_data;
+ struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+ struct ar9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
- printk(KERN_DEBUG "%s: => FRAME [skb:%p, queue:%d, DA:[%pM] "
- "mac_control:%04x, phy_control:%08x]\n",
+ printk(KERN_DEBUG "%s: => FRAME [skb:%p, q:%d, DA:[%pM] flags:%x "
+ "mac_ctrl:%04x, phy_ctrl:%08x, timeout:[%d ms]]\n",
wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
- ieee80211_get_DA(hdr), le16_to_cpu(txc->mac_control),
- le32_to_cpu(txc->phy_control));
+ ieee80211_get_DA(hdr), arinfo->flags,
+ le16_to_cpu(txc->mac_control), le32_to_cpu(txc->phy_control),
+ jiffies_to_msecs(arinfo->timeout - jiffies));
}
-static void ar9170_dump_station_tx_status_queue(struct ar9170 *ar,
- struct sk_buff_head *queue)
+static void __ar9170_dump_txqueue(struct ar9170 *ar,
+ struct sk_buff_head *queue)
{
struct sk_buff *skb;
int i = 0;
printk(KERN_DEBUG "---[ cut here ]---\n");
- printk(KERN_DEBUG "%s: %d entries in tx_status queue.\n",
+ printk(KERN_DEBUG "%s: %d entries in queue.\n",
wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
skb_queue_walk(queue, skb) {
- struct ar9170_tx_control *txc = (void *) skb->data;
- struct ieee80211_hdr *hdr = (void *)txc->frame_data;
-
- printk(KERN_DEBUG "index:%d => \n", i);
+ printk(KERN_DEBUG "index:%d => \n", i++);
ar9170_print_txheader(ar, skb);
}
+ if (i != skb_queue_len(queue))
+ printk(KERN_DEBUG "WARNING: queue frame counter "
+ "mismatch %d != %d\n", skb_queue_len(queue), i);
printk(KERN_DEBUG "---[ end ]---\n");
}
-#endif /* AR9170_QUEUE_DEBUG */
-void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb,
- bool valid_status, u16 tx_status)
+static void ar9170_dump_txqueue(struct ar9170 *ar,
+ struct sk_buff_head *queue)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ __ar9170_dump_txqueue(ar, queue);
+ spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void __ar9170_dump_txstats(struct ar9170 *ar)
+{
+ int i;
+
+ printk(KERN_DEBUG "%s: QoS queue stats\n",
+ wiphy_name(ar->hw->wiphy));
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++)
+ printk(KERN_DEBUG "%s: queue:%d limit:%d len:%d waitack:%d\n",
+ wiphy_name(ar->hw->wiphy), i, ar->tx_stats[i].limit,
+ ar->tx_stats[i].len, skb_queue_len(&ar->tx_status[i]));
+}
+
+static void ar9170_dump_txstats(struct ar9170 *ar)
{
- struct ieee80211_tx_info *txinfo;
- unsigned int retries = 0, queue = skb_get_queue_mapping(skb);
unsigned long flags;
spin_lock_irqsave(&ar->tx_stats_lock, flags);
- ar->tx_stats[queue].len--;
- if (ieee80211_queue_stopped(ar->hw, queue))
- ieee80211_wake_queue(ar->hw, queue);
+ __ar9170_dump_txstats(ar);
spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+}
+#endif /* AR9170_QUEUE_DEBUG */
+
+/* caller must guarantee exclusive access for _bin_ queue. */
+static void ar9170_recycle_expired(struct ar9170 *ar,
+ struct sk_buff_head *queue,
+ struct sk_buff_head *bin)
+{
+ struct sk_buff *skb, *old = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ while ((skb = skb_peek(queue))) {
+ struct ieee80211_tx_info *txinfo;
+ struct ar9170_tx_info *arinfo;
+
+ txinfo = IEEE80211_SKB_CB(skb);
+ arinfo = (void *) txinfo->rate_driver_data;
+
+ if (time_is_before_jiffies(arinfo->timeout)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: [%ld > %ld] frame expired => "
+ "recycle \n", wiphy_name(ar->hw->wiphy),
+ jiffies, arinfo->timeout);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ __skb_unlink(skb, queue);
+ __skb_queue_tail(bin, skb);
+ } else {
+ break;
+ }
+
+ if (unlikely(old == skb)) {
+ /* bail out - queue is shot. */
+
+ WARN_ON(1);
+ break;
+ }
+ old = skb;
+ }
+ spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static void ar9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+ u16 tx_status)
+{
+ struct ieee80211_tx_info *txinfo;
+ unsigned int retries = 0;
txinfo = IEEE80211_SKB_CB(skb);
ieee80211_tx_info_clear_status(txinfo);
break;
}
- if (valid_status)
- txinfo->status.rates[0].count = retries + 1;
-
+ txinfo->status.rates[0].count = retries + 1;
skb_pull(skb, sizeof(struct ar9170_tx_control));
ieee80211_tx_status_irqsafe(ar->hw, skb);
}
-static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar,
- const u8 *mac,
- const u32 queue,
- struct sk_buff_head *q)
+void ar9170_tx_callback(struct ar9170 *ar, struct sk_buff *skb)
{
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ar9170_tx_info *arinfo = (void *) info->rate_driver_data;
+ unsigned int queue = skb_get_queue_mapping(skb);
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;
- u32 txc_queue = (le32_to_cpu(txc->phy_control) &
- AR9170_TX_PHY_QOS_MASK) >>
- AR9170_TX_PHY_QOS_SHIFT;
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[queue].len--;
- if ((queue != txc_queue) ||
- (compare_ether_addr(ieee80211_get_DA(hdr), mac)))
- continue;
+ if (skb_queue_empty(&ar->tx_pending[queue])) {
+#ifdef AR9170_QUEUE_STOP_DEBUG
+ printk(KERN_DEBUG "%s: wake queue %d\n",
+ wiphy_name(ar->hw->wiphy), queue);
+ __ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_STOP_DEBUG */
+ ieee80211_wake_queue(ar->hw, queue);
+ }
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
- __skb_unlink(skb, q);
- spin_unlock_irqrestore(&q->lock, flags);
- return skb;
+ if (arinfo->flags & AR9170_TX_FLAG_BLOCK_ACK) {
+ dev_kfree_skb_any(skb);
+ } else if (arinfo->flags & AR9170_TX_FLAG_WAIT_FOR_ACK) {
+ arinfo->timeout = jiffies +
+ msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+ skb_queue_tail(&ar->tx_status[queue], skb);
+ } else if (arinfo->flags & AR9170_TX_FLAG_NO_ACK) {
+ ar9170_tx_status(ar, skb, AR9170_TX_STATUS_FAILED);
+ } else {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: unsupported frame flags!\n",
+ wiphy_name(ar->hw->wiphy));
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ dev_kfree_skb_any(skb);
+ }
+
+ if (!ar->tx_stats[queue].len &&
+ !skb_queue_empty(&ar->tx_pending[queue])) {
+ ar9170_tx(ar);
}
- 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)
+static struct sk_buff *ar9170_get_queued_skb(struct ar9170 *ar,
+ const u8 *mac,
+ struct sk_buff_head *queue,
+ const u32 rate)
{
- struct ieee80211_sta *sta;
+ unsigned long flags;
struct sk_buff *skb;
/*
* the firmware provided (-> destination MAC, and phy_control) -
* and hope that we picked the right one...
*/
- rcu_read_lock();
- sta = ieee80211_find_sta(ar->hw, mac);
-
- if (likely(sta)) {
- struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv;
- skb = skb_dequeue(&sta_priv->tx_status[queue]);
- rcu_read_unlock();
- if (likely(skb))
- return skb;
- } else
- rcu_read_unlock();
-
- /* 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);
- }
+ spin_lock_irqsave(&queue->lock, flags);
+ skb_queue_walk(queue, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+ u32 r;
+
+ if (mac && compare_ether_addr(ieee80211_get_DA(hdr), mac)) {
#ifdef AR9170_QUEUE_DEBUG
- if (unlikely((!skb) && net_ratelimit())) {
- printk(KERN_ERR "%s: ESS:[%pM] does not have any "
- "outstanding frames in this queue (%d).\n",
- wiphy_name(ar->hw->wiphy), mac, queue);
+ printk(KERN_DEBUG "%s: skip frame => DA %pM != %pM\n",
+ wiphy_name(ar->hw->wiphy), mac,
+ ieee80211_get_DA(hdr));
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ continue;
+ }
+
+ r = (le32_to_cpu(txc->phy_control) & AR9170_TX_PHY_MCS_MASK) >>
+ AR9170_TX_PHY_MCS_SHIFT;
+
+ if ((rate != AR9170_TX_INVALID_RATE) && (r != rate)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: skip frame => rate %d != %d\n",
+ wiphy_name(ar->hw->wiphy), rate, r);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ continue;
+ }
+
+ __skb_unlink(skb, queue);
+ spin_unlock_irqrestore(&queue->lock, flags);
+ return skb;
}
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_ERR "%s: ESS:[%pM] does not have any "
+ "outstanding frames in queue.\n",
+ wiphy_name(ar->hw->wiphy), mac);
+ __ar9170_dump_txqueue(ar, queue);
#endif /* AR9170_QUEUE_DEBUG */
- return skb;
+ spin_unlock_irqrestore(&queue->lock, flags);
+
+ return NULL;
}
/*
- * This worker tries to keep the global tx_status queue empty.
- * So we can guarantee that incoming tx_status reports for
- * unregistered stations are always synced with the actual
- * frame - which we think - belongs to.
+ * This worker tries to keeps an maintain tx_status queues.
+ * So we can guarantee that incoming tx_status reports are
+ * actually for a pending frame.
*/
-static void ar9170_tx_status_janitor(struct work_struct *work)
+static void ar9170_tx_janitor(struct work_struct *work)
{
struct ar9170 *ar = container_of(work, struct ar9170,
- tx_status_janitor.work);
- struct sk_buff *skb;
+ tx_janitor.work);
+ struct sk_buff_head waste;
+ unsigned int i;
+ bool resched = false;
if (unlikely(!IS_STARTED(ar)))
return ;
- /* recycle the garbage back to mac80211... one by one. */
- while ((skb = skb_dequeue(&ar->global_tx_status_waste))) {
+ skb_queue_head_init(&waste);
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
#ifdef AR9170_QUEUE_DEBUG
- printk(KERN_DEBUG "%s: dispose queued frame =>\n",
- wiphy_name(ar->hw->wiphy));
- ar9170_print_txheader(ar, skb);
+ printk(KERN_DEBUG "%s: garbage collector scans queue:%d\n",
+ wiphy_name(ar->hw->wiphy), i);
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+ ar9170_dump_txqueue(ar, &ar->tx_status[i]);
#endif /* AR9170_QUEUE_DEBUG */
- ar9170_handle_tx_status(ar, skb, false,
- 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",
- wiphy_name(ar->hw->wiphy));
+ ar9170_recycle_expired(ar, &ar->tx_status[i], &waste);
+ ar9170_recycle_expired(ar, &ar->tx_pending[i], &waste);
+ skb_queue_purge(&waste);
- ar9170_print_txheader(ar, skb);
-#endif /* AR9170_QUEUE_DEBUG */
- skb_queue_tail(&ar->global_tx_status_waste, skb);
+ if (!skb_queue_empty(&ar->tx_status[i]) ||
+ !skb_queue_empty(&ar->tx_pending[i]))
+ resched = true;
}
- /* recall the janitor in 100ms - if there's garbage in the can. */
- if (skb_queue_len(&ar->global_tx_status_waste) > 0)
- queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
- msecs_to_jiffies(100));
+ if (resched)
+ queue_delayed_work(ar->hw->workqueue,
+ &ar->tx_janitor,
+ msecs_to_jiffies(AR9170_JANITOR_DELAY));
}
void ar9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
*/
struct sk_buff *skb;
- u32 queue = (le32_to_cpu(cmd->tx_status.rate) &
- AR9170_TX_PHY_QOS_MASK) >> AR9170_TX_PHY_QOS_SHIFT;
+ u32 phy = le32_to_cpu(cmd->tx_status.rate);
+ u32 q = (phy & AR9170_TX_PHY_QOS_MASK) >>
+ AR9170_TX_PHY_QOS_SHIFT;
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: recv tx_status for %pM, p:%08x, q:%d\n",
+ wiphy_name(ar->hw->wiphy), cmd->tx_status.dst, phy, q);
+#endif /* AR9170_QUEUE_DEBUG */
- skb = ar9170_find_queued_skb(ar, cmd->tx_status.dst, queue);
+ skb = ar9170_get_queued_skb(ar, cmd->tx_status.dst,
+ &ar->tx_status[q],
+ AR9170_TX_INVALID_RATE);
if (unlikely(!skb))
return ;
- ar9170_handle_tx_status(ar, skb, true,
- le16_to_cpu(cmd->tx_status.status));
+ ar9170_tx_status(ar, skb, le16_to_cpu(cmd->tx_status.status));
break;
}
ar->rx_mpdu.has_plcp = false;
}
-static int ar9170_nag_limiter(struct ar9170 *ar)
+int ar9170_nag_limiter(struct ar9170 *ar)
{
bool print_message;
/* reinitialize queues statistics */
memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
- for (i = 0; i < ARRAY_SIZE(ar->tx_stats); i++)
- ar->tx_stats[i].limit = 8;
+ for (i = 0; i < __AR9170_NUM_TXQ; i++)
+ ar->tx_stats[i].limit = AR9170_TXQ_DEPTH;
/* reset QoS defaults */
AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
static void ar9170_op_stop(struct ieee80211_hw *hw)
{
struct ar9170 *ar = hw->priv;
+ unsigned int i;
if (IS_STARTED(ar))
ar->state = AR9170_IDLE;
flush_workqueue(ar->hw->workqueue);
- cancel_delayed_work_sync(&ar->tx_status_janitor);
+ cancel_delayed_work_sync(&ar->tx_janitor);
cancel_work_sync(&ar->filter_config_work);
cancel_work_sync(&ar->beacon_work);
mutex_lock(&ar->mutex);
- skb_queue_purge(&ar->global_tx_status_waste);
- skb_queue_purge(&ar->global_tx_status);
if (IS_ACCEPTING_CMD(ar)) {
ar9170_set_leds_state(ar, 0);
ar->stop(ar);
}
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ skb_queue_purge(&ar->tx_pending[i]);
+ skb_queue_purge(&ar->tx_status[i]);
+ }
mutex_unlock(&ar->mutex);
}
-int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+static int ar9170_tx_prepare(struct ar9170 *ar, struct sk_buff *skb)
{
- struct ar9170 *ar = hw->priv;
struct ieee80211_hdr *hdr;
struct ar9170_tx_control *txc;
struct ieee80211_tx_info *info;
- struct ieee80211_rate *rate = NULL;
struct ieee80211_tx_rate *txrate;
+ struct ar9170_tx_info *arinfo;
unsigned int queue = skb_get_queue_mapping(skb);
- unsigned long flags = 0;
- struct ar9170_sta_info *sta_info = NULL;
- u32 power, chains;
u16 keytype = 0;
u16 len, icv = 0;
- int err;
- bool tx_status;
- if (unlikely(!IS_STARTED(ar)))
- goto err_free;
+ BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
hdr = (void *)skb->data;
info = IEEE80211_SKB_CB(skb);
len = skb->len;
- spin_lock_irqsave(&ar->tx_stats_lock, flags);
- if (ar->tx_stats[queue].limit < ar->tx_stats[queue].len) {
- spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
- return NETDEV_TX_OK;
- }
-
- ar->tx_stats[queue].len++;
- ar->tx_stats[queue].count++;
- if (ar->tx_stats[queue].limit == ar->tx_stats[queue].len)
- ieee80211_stop_queue(hw, queue);
-
- spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
-
txc = (void *)skb_push(skb, sizeof(*txc));
- tx_status = (((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) != 0) ||
- ((info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) != 0));
-
if (info->control.hw_key) {
icv = info->control.hw_key->icv_len;
break;
default:
WARN_ON(1);
- goto err_dequeue;
+ goto err_out;
}
}
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
- if (info->flags & IEEE80211_TX_CTL_AMPDU)
- txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
-
txrate = &info->control.rates[0];
-
if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
+ arinfo = (void *)info->rate_driver_data;
+ arinfo->timeout = jiffies + msecs_to_jiffies(AR9170_QUEUE_TIMEOUT);
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (is_valid_ether_addr(ieee80211_get_DA(hdr)))) {
+ if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+ if (unlikely(!info->control.sta))
+ goto err_out;
+
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
+ arinfo->flags = AR9170_TX_FLAG_BLOCK_ACK;
+ goto out;
+ }
+
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
+ /*
+ * WARNING:
+ * Putting the QoS queue bits into an unexplored territory is
+ * certainly not elegant.
+ *
+ * In my defense: This idea provides a reasonable way to
+ * smuggle valuable information to the tx_status callback.
+ * Also, the idea behind this bit-abuse came straight from
+ * the original driver code.
+ */
+
+ txc->phy_control |=
+ cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
+ arinfo->flags = AR9170_TX_FLAG_WAIT_FOR_ACK;
+ } else {
+ arinfo->flags = AR9170_TX_FLAG_NO_ACK;
+ }
+
+out:
+ return 0;
+
+err_out:
+ skb_pull(skb, sizeof(*txc));
+ return -EINVAL;
+}
+
+static void ar9170_tx_prepare_phy(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ar9170_tx_control *txc;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_rate *rate = NULL;
+ struct ieee80211_tx_rate *txrate;
+ u32 power, chains;
+
+ txc = (void *) skb->data;
+ info = IEEE80211_SKB_CB(skb);
+ txrate = &info->control.rates[0];
+
if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
u32 r = txrate->idx;
u8 *txpower;
+ /* heavy clip control */
+ txc->phy_control |= cpu_to_le32((r & 0x7) << 7);
+
r <<= AR9170_TX_PHY_MCS_SHIFT;
- if (WARN_ON(r & ~AR9170_TX_PHY_MCS_MASK))
- goto err_dequeue;
+ BUG_ON(r & ~AR9170_TX_PHY_MCS_MASK);
+
txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
chains = AR9170_TX_PHY_TXCHAIN_1;
}
txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
+}
- if (tx_status) {
- txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
- /*
- * WARNING:
- * Putting the QoS queue bits into an unexplored territory is
- * certainly not elegant.
- *
- * In my defense: This idea provides a reasonable way to
- * smuggle valuable information to the tx_status callback.
- * Also, the idea behind this bit-abuse came straight from
- * the original driver code.
- */
+static void ar9170_tx(struct ar9170 *ar)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct ieee80211_tx_info *info;
+ struct ar9170_tx_info *arinfo;
+ unsigned int i, frames, frames_failed, remaining_space;
+ int err;
+ bool schedule_garbagecollector = false;
- txc->phy_control |=
- cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
+ BUILD_BUG_ON(sizeof(*arinfo) > sizeof(info->rate_driver_data));
- if (info->control.sta) {
- sta_info = (void *) info->control.sta->drv_priv;
- skb_queue_tail(&sta_info->tx_status[queue], skb);
- } else {
- skb_queue_tail(&ar->global_tx_status, skb);
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ remaining_space = AR9170_TX_MAX_PENDING;
+
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ if (ar->tx_stats[i].len >= ar->tx_stats[i].limit) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: queue %d full\n",
+ wiphy_name(ar->hw->wiphy), i);
+
+ __ar9170_dump_txstats(ar);
+ printk(KERN_DEBUG "stuck frames: ===> \n");
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+ ar9170_dump_txqueue(ar, &ar->tx_status[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+ ieee80211_stop_queue(ar->hw, i);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+ continue;
+ }
- queue_delayed_work(ar->hw->workqueue,
- &ar->tx_status_janitor,
- msecs_to_jiffies(100));
+ frames = min(ar->tx_stats[i].limit - ar->tx_stats[i].len,
+ skb_queue_len(&ar->tx_pending[i]));
+
+ if (remaining_space < frames) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: tx quota reached queue:%d, "
+ "remaining slots:%d, needed:%d\n",
+ wiphy_name(ar->hw->wiphy), i, remaining_space,
+ frames);
+
+ ar9170_dump_txstats(ar);
+#endif /* AR9170_QUEUE_DEBUG */
+ frames = remaining_space;
+ }
+
+ ar->tx_stats[i].len += frames;
+ ar->tx_stats[i].count += frames;
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+ if (!frames)
+ continue;
+
+ frames_failed = 0;
+ while (frames) {
+ skb = skb_dequeue(&ar->tx_pending[i]);
+ if (unlikely(!skb)) {
+ frames_failed += frames;
+ frames = 0;
+ break;
+ }
+
+ info = IEEE80211_SKB_CB(skb);
+ arinfo = (void *) info->rate_driver_data;
+
+ /* TODO: cancel stuck frames */
+ arinfo->timeout = jiffies +
+ msecs_to_jiffies(AR9170_TX_TIMEOUT);
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: send frame q:%d =>\n",
+ wiphy_name(ar->hw->wiphy), i);
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ err = ar->tx(ar, skb);
+ if (unlikely(err)) {
+ frames_failed++;
+ dev_kfree_skb_any(skb);
+ } else {
+ remaining_space--;
+ schedule_garbagecollector = true;
+ }
+
+ frames--;
+ }
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: ar9170_tx report for queue %d\n",
+ wiphy_name(ar->hw->wiphy), i);
+
+ printk(KERN_DEBUG "%s: unprocessed pending frames left:\n",
+ wiphy_name(ar->hw->wiphy));
+ ar9170_dump_txqueue(ar, &ar->tx_pending[i]);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ if (unlikely(frames_failed)) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: frames failed =>\n",
+ wiphy_name(ar->hw->wiphy), frames_failed);
+#endif /* AR9170_QUEUE_DEBUG */
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[i].len -= frames_failed;
+ ar->tx_stats[i].count -= frames_failed;
+ ieee80211_wake_queue(ar->hw, i);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
}
}
- err = ar->tx(ar, skb, tx_status, 0);
- if (unlikely(tx_status && err)) {
- if (info->control.sta)
- skb_unlink(skb, &sta_info->tx_status[queue]);
- else
- skb_unlink(skb, &ar->global_tx_status);
+ if (schedule_garbagecollector)
+ queue_delayed_work(ar->hw->workqueue,
+ &ar->tx_janitor,
+ msecs_to_jiffies(AR9170_JANITOR_DELAY));
+}
+
+int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct ar9170 *ar = hw->priv;
+ struct ieee80211_tx_info *info;
+
+ if (unlikely(!IS_STARTED(ar)))
+ goto err_free;
+
+ if (unlikely(ar9170_tx_prepare(ar, skb)))
+ goto err_free;
+
+ info = IEEE80211_SKB_CB(skb);
+ if (info->flags & IEEE80211_TX_CTL_AMPDU) {
+ /* drop frame, we do not allow TX A-MPDU aggregation yet. */
+ goto err_free;
+ } else {
+ unsigned int queue = skb_get_queue_mapping(skb);
+
+ ar9170_tx_prepare_phy(ar, skb);
+ skb_queue_tail(&ar->tx_pending[queue], skb);
}
+ ar9170_tx(ar);
return NETDEV_TX_OK;
-err_dequeue:
- spin_lock_irqsave(&ar->tx_stats_lock, flags);
- ar->tx_stats[queue].len--;
- ar->tx_stats[queue].count--;
- spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
-
err_free:
- dev_kfree_skb(skb);
+ dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}
enum sta_notify_cmd cmd,
struct ieee80211_sta *sta)
{
- 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:
- 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 global tx_status queue
- */
-
- 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));
-
- ar9170_print_txheader(ar, skb);
-#endif /* AR9170_QUEUE_DEBUG */
- skb_queue_tail(&ar->global_tx_status, skb);
- }
- }
- queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
- msecs_to_jiffies(100));
- break;
-
- default:
- break;
- }
}
static int ar9170_get_stats(struct ieee80211_hw *hw,
int ret;
mutex_lock(&ar->mutex);
- if ((param) && !(queue > ar->hw->queues)) {
+ if ((param) && !(queue > __AR9170_NUM_TXQ)) {
memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
param, sizeof(*param));
mutex_init(&ar->mutex);
spin_lock_init(&ar->cmdlock);
spin_lock_init(&ar->tx_stats_lock);
- skb_queue_head_init(&ar->global_tx_status);
- skb_queue_head_init(&ar->global_tx_status_waste);
+ for (i = 0; i < __AR9170_NUM_TXQ; i++) {
+ skb_queue_head_init(&ar->tx_status[i]);
+ skb_queue_head_init(&ar->tx_pending[i]);
+ }
ar9170_rx_reset_rx_mpdu(ar);
INIT_WORK(&ar->filter_config_work, ar9170_set_filters);
INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
- INIT_DELAYED_WORK(&ar->tx_status_janitor, ar9170_tx_status_janitor);
+ INIT_DELAYED_WORK(&ar->tx_janitor, ar9170_tx_janitor);
/* all hw supports 2.4 GHz, so set channel to 1 by default */
ar->channel = &ar9170_2ghz_chantable[0];
git.openpandora.org / pandora-kernel.git / commitdiff