Anilkumar Kolli <akolli@xxxxxxxxxxxxxx> writes:
> On 2018-09-20 21:40, Toke Høiland-Jørgensen wrote:
>> Anilkumar Kolli <akolli@xxxxxxxxxxxxxx> writes:
>>
>>> Current mac80211 has provision to update tx status through
>>> ieee80211_tx_status() and ieee80211_tx_status_ext(). But
>>> drivers like ath10k updates the tx status from the skb except
>>> txrate, txrate will be updated from a different path, peer stats.
>>>
>>> Using ieee80211_tx_status_ext() in two different paths
>>> - (one for the stats, one for the tx rate) will duplicate the stats.
>>>
>>> To avoid this stats duplication, ieee80211_tx_rate_update() is
>>> implemented.
>>>
>>> Signed-off-by: Anilkumar Kolli <akolli@xxxxxxxxxxxxxx>
>>> ---
>>> V3:
>>> - Added new API in mac80211 to update tx rate(Johannes)
>>>
>>> include/net/mac80211.h | 14 ++++++++++++++
>>> net/mac80211/status.c | 24 ++++++++++++++++++++++++
>>> 2 files changed, 38 insertions(+)
>>>
>>> diff --git a/include/net/mac80211.h b/include/net/mac80211.h
>>> index 8c26d2d36cbe..042186a21770 100644
>>> --- a/include/net/mac80211.h
>>> +++ b/include/net/mac80211.h
>>> @@ -4331,6 +4331,20 @@ void
>>> ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
>>> u32 thr);
>>>
>>> /**
>>> + * ieee80211_tx_rate_update - transmit rate update callback
>>> + *
>>> + * This function can be used in drivers that does not have provision
>>> + * in updating the tx rate in data path.
>>> + *
>>> + * @hw: the hardware the frame was transmitted by
>>> + * @status: tx status information
>>> + * @pubsta: the station to update the tx rate for.
>>> + */
>>> +void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
>>> + struct ieee80211_sta *pubsta,
>>> + struct ieee80211_tx_info *info);
>>> +
>>> +/**
>>> * ieee80211_tx_status - transmit status callback
>>> *
>>> * Call this function for all transmitted frames after they have been
>>> diff --git a/net/mac80211/status.c b/net/mac80211/status.c
>>> index 9a6d7208bf4f..232297ddaa02 100644
>>> --- a/net/mac80211/status.c
>>> +++ b/net/mac80211/status.c
>>> @@ -988,6 +988,30 @@ void ieee80211_tx_status_ext(struct ieee80211_hw
>>> *hw,
>>> }
>>> EXPORT_SYMBOL(ieee80211_tx_status_ext);
>>>
>>> +void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
>>> + struct ieee80211_sta *pubsta,
>>> + struct ieee80211_tx_info *info)
>>> +{
>>> + struct ieee80211_local *local = hw_to_local(hw);
>>> + struct ieee80211_supported_band *sband;
>>> + struct sta_info *sta;
>>> + struct ieee80211_tx_status status;
>>> +
>>> + sband = hw->wiphy->bands[info->band];
>>> +
>>> + if (pubsta) {
>>
>> The function does nothing if pubsta is NULL; wouldn't it make more
>> sense
>> to just mandate that it isn't NULL rather than have this check?
>>
>
> ATH10K driver always calls this function with a valid STA [not NULL].
Yeah, so why the check for non-NULL? :)
-Toke
