2 * Copyright 2004, Instant802 Networks, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include <linux/netdevice.h>
10 #include <linux/skbuff.h>
11 #include <linux/module.h>
12 #include <linux/if_arp.h>
13 #include <linux/types.h>
15 #include <net/pkt_sched.h>
17 #include <net/mac80211.h>
18 #include "ieee80211_i.h"
21 /* Default mapping in classifier to work with default
24 const int ieee802_1d_to_ac[8] = {
35 static int wme_downgrade_ac(struct sk_buff *skb)
37 switch (skb->priority) {
40 skb->priority = 5; /* VO -> VI */
44 skb->priority = 3; /* VI -> BE */
48 skb->priority = 2; /* BE -> BK */
56 /* Indicate which queue to use. */
57 u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
60 struct ieee80211_local *local = sdata->local;
61 struct sta_info *sta = NULL;
65 if (local->hw.queues < 4 || skb->len < 6) {
66 skb->priority = 0; /* required for correct WPA/11i MIC */
67 return min_t(u16, local->hw.queues - 1, IEEE80211_AC_BE);
71 switch (sdata->vif.type) {
72 case NL80211_IFTYPE_AP_VLAN:
73 sta = rcu_dereference(sdata->u.vlan.sta);
75 qos = test_sta_flag(sta, WLAN_STA_WME);
78 case NL80211_IFTYPE_AP:
81 case NL80211_IFTYPE_WDS:
82 ra = sdata->u.wds.remote_addr;
84 #ifdef CONFIG_MAC80211_MESH
85 case NL80211_IFTYPE_MESH_POINT:
89 case NL80211_IFTYPE_STATION:
90 ra = sdata->u.mgd.bssid;
92 case NL80211_IFTYPE_ADHOC:
99 if (!sta && ra && !is_multicast_ether_addr(ra)) {
100 sta = sta_info_get(sdata, ra);
102 qos = test_sta_flag(sta, WLAN_STA_WME);
107 skb->priority = 0; /* required for correct WPA/11i MIC */
108 return IEEE80211_AC_BE;
111 /* use the data classifier to determine what 802.1d tag the
113 skb->priority = cfg80211_classify8021d(skb);
115 return ieee80211_downgrade_queue(local, skb);
118 u16 ieee80211_downgrade_queue(struct ieee80211_local *local,
121 /* in case we are a client verify acm is not set for this ac */
122 while (unlikely(local->wmm_acm & BIT(skb->priority))) {
123 if (wme_downgrade_ac(skb)) {
125 * This should not really happen. The AP has marked all
126 * lower ACs to require admission control which is not
127 * a reasonable configuration. Allow the frame to be
128 * transmitted using AC_BK as a workaround.
134 /* look up which queue to use for frames with this 1d tag */
135 return ieee802_1d_to_ac[skb->priority];
138 void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
141 struct ieee80211_hdr *hdr = (void *)skb->data;
143 /* Fill in the QoS header if there is one. */
144 if (ieee80211_is_data_qos(hdr->frame_control)) {
145 u8 *p = ieee80211_get_qos_ctl(hdr);
146 u8 ack_policy = 0, tid;
148 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
150 if (unlikely(sdata->local->wifi_wme_noack_test))
151 ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
152 /* qos header is 2 bytes */
153 *p++ = ack_policy | tid;
154 *p = ieee80211_vif_is_mesh(&sdata->vif) ?
155 (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8) : 0;