ac7ccf739a
This updates to backports-4.19.57-1 which contains the wireless subsystem and driver from kernel 4.19.57. The removed patches are applied upstream. Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
184 lines
5.0 KiB
Diff
184 lines
5.0 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 22 Mar 2019 18:06:03 +0100
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Subject: [PATCH] mac80211: when using iTXQ, select the queue in
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ieee80211_subif_start_xmit
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When using iTXQ, the network stack does not need the real queue number, since
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mac80211 is using its internal queues anyway. In that case we can defer
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selecting the queue and remove a redundant station lookup in the tx path to save
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some CPU cycles.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -3751,6 +3751,7 @@ void __ieee80211_subif_start_xmit(struct
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u32 info_flags)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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+ struct ieee80211_local *local = sdata->local;
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struct sta_info *sta;
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struct sk_buff *next;
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@@ -3764,7 +3765,15 @@ void __ieee80211_subif_start_xmit(struct
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if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
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goto out_free;
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- if (!IS_ERR_OR_NULL(sta)) {
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+ if (IS_ERR(sta))
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+ sta = NULL;
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+
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+ if (local->ops->wake_tx_queue) {
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+ u16 queue = __ieee80211_select_queue(sdata, sta, skb);
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+ skb_set_queue_mapping(skb, queue);
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+ }
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+
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+ if (sta) {
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struct ieee80211_fast_tx *fast_tx;
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/* We need a bit of data queued to build aggregates properly, so
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--- a/net/mac80211/wme.c
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+++ b/net/mac80211/wme.c
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@@ -141,6 +141,42 @@ u16 ieee80211_select_queue_80211(struct
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return ieee80211_downgrade_queue(sdata, NULL, skb);
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}
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+u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
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+ struct sta_info *sta, struct sk_buff *skb)
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+{
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+ struct mac80211_qos_map *qos_map;
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+ bool qos;
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+
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+ /* all mesh/ocb stations are required to support WME */
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+ if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
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+ sdata->vif.type == NL80211_IFTYPE_OCB)
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+ qos = true;
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+ else if (sta)
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+ qos = sta->sta.wme;
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+ else
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+ qos = false;
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+
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+ if (!qos) {
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+ skb->priority = 0; /* required for correct WPA/11i MIC */
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+ return IEEE80211_AC_BE;
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+ }
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+
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+ if (skb->protocol == sdata->control_port_protocol) {
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+ skb->priority = 7;
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+ goto downgrade;
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+ }
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+
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+ /* use the data classifier to determine what 802.1d tag the
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+ * data frame has */
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+ qos_map = rcu_dereference(sdata->qos_map);
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+ skb->priority = cfg80211_classify8021d(skb, qos_map ?
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+ &qos_map->qos_map : NULL);
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+
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+ downgrade:
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+ return ieee80211_downgrade_queue(sdata, sta, skb);
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+}
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+
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+
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/* Indicate which queue to use. */
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u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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@@ -148,10 +184,12 @@ u16 ieee80211_select_queue(struct ieee80
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struct ieee80211_local *local = sdata->local;
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struct sta_info *sta = NULL;
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const u8 *ra = NULL;
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- bool qos = false;
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- struct mac80211_qos_map *qos_map;
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u16 ret;
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+ /* when using iTXQ, we can do this later */
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+ if (local->ops->wake_tx_queue)
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+ return 0;
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+
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if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) {
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skb->priority = 0; /* required for correct WPA/11i MIC */
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return 0;
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@@ -161,10 +199,8 @@ u16 ieee80211_select_queue(struct ieee80
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP_VLAN:
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sta = rcu_dereference(sdata->u.vlan.sta);
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- if (sta) {
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- qos = sta->sta.wme;
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+ if (sta)
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break;
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- }
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/* fall through */
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case NL80211_IFTYPE_AP:
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ra = skb->data;
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@@ -172,56 +208,26 @@ u16 ieee80211_select_queue(struct ieee80
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case NL80211_IFTYPE_WDS:
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ra = sdata->u.wds.remote_addr;
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break;
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-#ifdef CPTCFG_MAC80211_MESH
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- case NL80211_IFTYPE_MESH_POINT:
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- qos = true;
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- break;
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-#endif
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case NL80211_IFTYPE_STATION:
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/* might be a TDLS station */
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sta = sta_info_get(sdata, skb->data);
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if (sta)
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- qos = sta->sta.wme;
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+ break;
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ra = sdata->u.mgd.bssid;
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break;
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case NL80211_IFTYPE_ADHOC:
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ra = skb->data;
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break;
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- case NL80211_IFTYPE_OCB:
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- /* all stations are required to support WME */
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- qos = true;
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- break;
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default:
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break;
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}
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- if (!sta && ra && !is_multicast_ether_addr(ra)) {
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+ if (!sta && ra && !is_multicast_ether_addr(ra))
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sta = sta_info_get(sdata, ra);
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- if (sta)
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- qos = sta->sta.wme;
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- }
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- if (!qos) {
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- skb->priority = 0; /* required for correct WPA/11i MIC */
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- ret = IEEE80211_AC_BE;
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- goto out;
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- }
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+ ret = __ieee80211_select_queue(sdata, sta, skb);
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- if (skb->protocol == sdata->control_port_protocol) {
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- skb->priority = 7;
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- goto downgrade;
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- }
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-
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- /* use the data classifier to determine what 802.1d tag the
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- * data frame has */
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- qos_map = rcu_dereference(sdata->qos_map);
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- skb->priority = cfg80211_classify8021d(skb, qos_map ?
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- &qos_map->qos_map : NULL);
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-
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- downgrade:
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- ret = ieee80211_downgrade_queue(sdata, sta, skb);
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- out:
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rcu_read_unlock();
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return ret;
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}
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--- a/net/mac80211/wme.h
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+++ b/net/mac80211/wme.h
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@@ -16,6 +16,8 @@
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u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb,
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struct ieee80211_hdr *hdr);
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+u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
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+ struct sta_info *sta, struct sk_buff *skb);
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u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb);
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void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
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