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mac80211: expose txq queue depth and size to drivers

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This will allow drivers to make more educated
decisions whether to defer transmission or not.

Relying on wake_tx_queue() call count implicitly
was not possible because it could be called
without queued frame count actually changing on
software tx aggregation start/stop code paths.

It was also not possible to know how long
byte-wise queue was without dequeueing.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Michal Kazior
2016-01-27 15:26:12 +01:00
committed by Johannes Berg
parent dfdfc2beb0
commit f2ac7e301a
6 changed files with 39 additions and 1 deletions
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15
include/net/mac80211.h
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@@ -5596,4 +5596,19 @@ void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
*/
struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
/**
* ieee80211_txq_get_depth - get pending frame/byte count of given txq
*
* The values are not guaranteed to be coherent with regard to each other, i.e.
* txq state can change half-way of this function and the caller may end up
* with "new" frame_cnt and "old" byte_cnt or vice-versa.
*
* @txq: pointer obtained from station or virtual interface
* @frame_cnt: pointer to store frame count
* @byte_cnt: pointer to store byte count
*/
void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
unsigned long *frame_cnt,
unsigned long *byte_cnt);
#endif /* MAC80211_H */