iwlagn: reclaim the packets in transport layer

The reclaim flow is really transport related. Define a simple API to allow the
upper layer to request from the transport layer to reclaim packets until an
index written in the Tx response / BA notification.
The transport layer prepares a list of the packets that are being freed and
passes this list to the upper layer.
Between the two layers, the CB of the skb is used to pass a pointer to the
context (BSS / PAN) in which the skb was sent.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index b4c7166a70e3..519ad91bda1c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -90,6 +90,7 @@ struct iwl_shared;
  * @send_cmd_pdu:send a host command: flags can be CMD_*
  * @get_tx_cmd: returns a pointer to a new Tx cmd for the upper layer use
  * @tx: send an skb
+ * @reclaim: free packet until ssn. Returns a list of freed packets.
  * @txq_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
  *                 ready and a successful ADDBA response has been received.
  * @txq_agg_disable: de-configure a Tx queue to send AMPDUs
@@ -123,6 +124,8 @@ struct iwl_trans_ops {
         int (*tx)(struct iwl_priv *priv, struct sk_buff *skb,
                 struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu,
                 struct iwl_rxon_context *ctx);
+        void (*reclaim)(struct iwl_trans *trans, int txq_id, int ssn,
+                        u32 status, struct sk_buff_head *skbs);
 
         int (*txq_agg_disable)(struct iwl_priv *priv, u16 txq_id,
                                   u16 ssn_idx, u8 tx_fifo);
@@ -213,6 +216,13 @@ static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
         return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu, ctx);
 }
 
+static inline void iwl_trans_reclaim(struct iwl_trans *trans, int txq_id,
+                                 int ssn, u32 status,
+                                 struct sk_buff_head *skbs)
+{
+        trans->ops->reclaim(trans, txq_id, ssn, status, skbs);
+}
+
 static inline int iwl_trans_txq_agg_disable(struct iwl_trans *trans, u16 txq_id,
                           u16 ssn_idx, u8 tx_fifo)
 {