Commit 9739fe29 authored by Sara Sharon's avatar Sara Sharon Committed by Johannes Berg
Browse files

mac80211: add an option for drivers to check if packets can be aggregated 



Some hardwares have limitations on the packets' type in AMSDU.
Add an optional driver callback to determine if two skbs can
be used in the same AMSDU or not.

Signed-off-by: default avatarSara Sharon <sara.sharon@intel.com>
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent edba6bda

include/net/mac80211.h

+7 −0
Original line number Diff line number Diff line
@@ -3594,6 +3594,10 @@ enum ieee80211_reconfig_type { 
 * @del_nan_func: Remove a NAN function. The driver must call

 *	ieee80211_nan_func_terminated() with

 *	NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST reason code upon removal.

 * @can_aggregate_in_amsdu: Called in order to determine if HW supports

 *	aggregating two specific frames in the same A-MSDU. The relation

 *	between the skbs should be symmetric and transitive. Note that while

 *	skb is always a real frame, head may or may not be an A-MSDU.

 */

struct ieee80211_ops {

	void (*tx)(struct ieee80211_hw *hw,
@@ -3876,6 +3880,9 @@ struct ieee80211_ops { 
	void (*del_nan_func)(struct ieee80211_hw *hw,

			    struct ieee80211_vif *vif,

			    u8 instance_id);

	bool (*can_aggregate_in_amsdu)(struct ieee80211_hw *hw,

				       struct sk_buff *head,

				       struct sk_buff *skb);

};



/**

net/mac80211/driver-ops.h

+10 −0
Original line number Diff line number Diff line
@@ -1173,6 +1173,16 @@ static inline void drv_wake_tx_queue(struct ieee80211_local *local, 
	local->ops->wake_tx_queue(&local->hw, &txq->txq);

}



static inline int drv_can_aggregate_in_amsdu(struct ieee80211_local *local,

					     struct sk_buff *head,

					     struct sk_buff *skb)

{

	if (!local->ops->can_aggregate_in_amsdu)

		return true;



	return local->ops->can_aggregate_in_amsdu(&local->hw, head, skb);

}



static inline int drv_start_nan(struct ieee80211_local *local,

				struct ieee80211_sub_if_data *sdata,

				struct cfg80211_nan_conf *conf)

net/mac80211/tx.c

+3 −0
Original line number Diff line number Diff line
@@ -3261,6 +3261,9 @@ static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, 
	if (max_frags && nfrags > max_frags)

		goto out;



	if (!drv_can_aggregate_in_amsdu(local, head, skb))

		goto out;



	if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))

		goto out;

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