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mac80211: move A-MPDU session check from minstrel_ht to mac80211

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This avoids calling back into tx handlers from within the rate control module.
Preparation for deferring rate control until tx dequeue

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210617163113.75815-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2021-06-17 18:31:11 +02:00 committed by Johannes Berg
parent 358ae88881
commit 08a46c6420
3 changed files with 33 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
include/net/mac80211.h
View file

@ -6184,6 +6184,11 @@ enum rate_control_capabilities {
* otherwise the NSS difference doesn't bother us.
*/
RATE_CTRL_CAPA_VHT_EXT_NSS_BW = BIT(0),
/**
* @RATE_CTRL_CAPA_AMPDU_TRIGGER:
* mac80211 should start A-MPDU sessions on tx
*/
RATE_CTRL_CAPA_AMPDU_TRIGGER = BIT(1),
};
struct rate_control_ops {

28
net/mac80211/rc80211_minstrel_ht.c
View file

@ -1175,29 +1175,6 @@ minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary)
}
}
static void
minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
u16 tid;
if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
return;
if (unlikely(!ieee80211_is_data_qos(hdr->frame_control)))
return;
if (unlikely(skb->protocol == cpu_to_be16(ETH_P_PAE)))
return;
tid = ieee80211_get_tid(hdr);
if (likely(sta->ampdu_mlme.tid_tx[tid]))
return;
ieee80211_start_tx_ba_session(pubsta, tid, 0);
}
static void
minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
void *priv_sta, struct ieee80211_tx_status *st)
@ -1502,10 +1479,6 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
struct minstrel_priv *mp = priv;
u16 sample_idx;
if (!(info->flags & IEEE80211_TX_CTL_AMPDU) &&
!minstrel_ht_is_legacy_group(MI_RATE_GROUP(mi->max_prob_rate)))
minstrel_aggr_check(sta, txrc->skb);
info->flags |= mi->tx_flags;
#ifdef CONFIG_MAC80211_DEBUGFS
@ -1911,6 +1884,7 @@ static u32 minstrel_ht_get_expected_throughput(void *priv_sta)
static const struct rate_control_ops mac80211_minstrel_ht = {
.name = "minstrel_ht",
.capa = RATE_CTRL_CAPA_AMPDU_TRIGGER,
.tx_status_ext = minstrel_ht_tx_status,
.get_rate = minstrel_ht_get_rate,
.rate_init = minstrel_ht_rate_init,

27
net/mac80211/tx.c
View file

@ -3949,6 +3949,29 @@ void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
}
EXPORT_SYMBOL(ieee80211_txq_schedule_start);
static void
ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct sk_buff *skb)
{
struct rate_control_ref *ref = sdata->local->rate_ctrl;
u16 tid;
if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
return;
if (!sta || !sta->sta.ht_cap.ht_supported ||
!sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
skb->protocol == sdata->control_port_protocol)
return;
tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
if (likely(sta->ampdu_mlme.tid_tx[tid]))
return;
ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
}
void __ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev,
u32 info_flags,
@ -3979,6 +4002,8 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
skb_get_hash(skb);
}
ieee80211_aggr_check(sdata, sta, skb);
if (sta) {
struct ieee80211_fast_tx *fast_tx;
@ -4242,6 +4267,8 @@ static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
memset(info, 0, sizeof(*info));
ieee80211_aggr_check(sdata, sta, skb);
tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
if (tid_tx) {