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path: root/drivers/net/wireless/ath/carl9170/tx.c
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Diffstat (limited to 'drivers/net/wireless/ath/carl9170/tx.c')
-rw-r--r--drivers/net/wireless/ath/carl9170/tx.c69
1 files changed, 66 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c
index aed305177af..6a8681407a1 100644
--- a/drivers/net/wireless/ath/carl9170/tx.c
+++ b/drivers/net/wireless/ath/carl9170/tx.c
@@ -277,11 +277,11 @@ static void carl9170_tx_release(struct kref *ref)
return;
BUILD_BUG_ON(
- offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23);
+ offsetof(struct ieee80211_tx_info, status.ack_signal) != 20);
- memset(&txinfo->status.ampdu_ack_len, 0,
+ memset(&txinfo->status.ack_signal, 0,
sizeof(struct ieee80211_tx_info) -
- offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
+ offsetof(struct ieee80211_tx_info, status.ack_signal));
if (atomic_read(&ar->tx_total_queued))
ar->tx_schedule = true;
@@ -436,6 +436,45 @@ out_rcu:
rcu_read_unlock();
}
+static void carl9170_tx_bar_status(struct ar9170 *ar, struct sk_buff *skb,
+ struct ieee80211_tx_info *tx_info)
+{
+ struct _carl9170_tx_superframe *super = (void *) skb->data;
+ struct ieee80211_bar *bar = (void *) super->frame_data;
+
+ /*
+ * Unlike all other frames, the status report for BARs does
+ * not directly come from the hardware as it is incapable of
+ * matching a BA to a previously send BAR.
+ * Instead the RX-path will scan for incoming BAs and set the
+ * IEEE80211_TX_STAT_ACK if it sees one that was likely
+ * caused by a BAR from us.
+ */
+
+ if (unlikely(ieee80211_is_back_req(bar->frame_control)) &&
+ !(tx_info->flags & IEEE80211_TX_STAT_ACK)) {
+ struct carl9170_bar_list_entry *entry;
+ int queue = skb_get_queue_mapping(skb);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(entry, &ar->bar_list[queue], list) {
+ if (entry->skb == skb) {
+ spin_lock_bh(&ar->bar_list_lock[queue]);
+ list_del_rcu(&entry->list);
+ spin_unlock_bh(&ar->bar_list_lock[queue]);
+ kfree_rcu(entry, head);
+ goto out;
+ }
+ }
+
+ WARN(1, "bar not found in %d - ra:%pM ta:%pM c:%x ssn:%x\n",
+ queue, bar->ra, bar->ta, bar->control,
+ bar->start_seq_num);
+out:
+ rcu_read_unlock();
+ }
+}
+
void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
const bool success)
{
@@ -445,6 +484,8 @@ void carl9170_tx_status(struct ar9170 *ar, struct sk_buff *skb,
txinfo = IEEE80211_SKB_CB(skb);
+ carl9170_tx_bar_status(ar, skb, txinfo);
+
if (success)
txinfo->flags |= IEEE80211_TX_STAT_ACK;
else
@@ -1265,6 +1306,26 @@ out_rcu:
return false;
}
+static void carl9170_bar_check(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct _carl9170_tx_superframe *super = (void *) skb->data;
+ struct ieee80211_bar *bar = (void *) super->frame_data;
+
+ if (unlikely(ieee80211_is_back_req(bar->frame_control)) &&
+ skb->len >= sizeof(struct ieee80211_bar)) {
+ struct carl9170_bar_list_entry *entry;
+ unsigned int queue = skb_get_queue_mapping(skb);
+
+ entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+ if (!WARN_ON_ONCE(!entry)) {
+ entry->skb = skb;
+ spin_lock_bh(&ar->bar_list_lock[queue]);
+ list_add_tail_rcu(&entry->list, &ar->bar_list[queue]);
+ spin_unlock_bh(&ar->bar_list_lock[queue]);
+ }
+ }
+}
+
static void carl9170_tx(struct ar9170 *ar)
{
struct sk_buff *skb;
@@ -1287,6 +1348,8 @@ static void carl9170_tx(struct ar9170 *ar)
if (unlikely(carl9170_tx_ps_drop(ar, skb)))
continue;
+ carl9170_bar_check(ar, skb);
+
atomic_inc(&ar->tx_total_pending);
q = __carl9170_get_queue(ar, i);