2 * Copyright 2004, Instant802 Networks, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/netdevice.h>
11 #include <linux/skbuff.h>
12 #include <linux/module.h>
13 #include <linux/if_arp.h>
14 #include <linux/types.h>
16 #include <net/pkt_sched.h>
18 #include <net/mac80211.h>
19 #include "ieee80211_i.h"
22 /* Default mapping in classifier to work with default
25 const int ieee802_1d_to_ac[8] = {
36 static int wme_downgrade_ac(struct sk_buff *skb)
38 switch (skb->priority) {
41 skb->priority = 5; /* VO -> VI */
45 skb->priority = 3; /* VI -> BE */
49 skb->priority = 2; /* BE -> BK */
56 static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata,
59 /* in case we are a client verify acm is not set for this ac */
60 while (unlikely(sdata->wmm_acm & BIT(skb->priority))) {
61 if (wme_downgrade_ac(skb)) {
63 * This should not really happen. The AP has marked all
64 * lower ACs to require admission control which is not
65 * a reasonable configuration. Allow the frame to be
66 * transmitted using AC_BK as a workaround.
72 /* look up which queue to use for frames with this 1d tag */
73 return ieee802_1d_to_ac[skb->priority];
76 /* Indicate which queue to use for this fully formed 802.11 frame */
77 u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
79 struct ieee80211_hdr *hdr)
81 struct ieee80211_local *local = sdata->local;
84 if (local->hw.queues < IEEE80211_NUM_ACS)
87 if (!ieee80211_is_data(hdr->frame_control)) {
89 return ieee802_1d_to_ac[skb->priority];
91 if (!ieee80211_is_data_qos(hdr->frame_control)) {
93 return ieee802_1d_to_ac[skb->priority];
96 p = ieee80211_get_qos_ctl(hdr);
97 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
99 return ieee80211_downgrade_queue(sdata, skb);
102 /* Indicate which queue to use. */
103 u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
106 struct ieee80211_local *local = sdata->local;
107 struct sta_info *sta = NULL;
110 struct mac80211_qos_map *qos_map;
112 if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) {
113 skb->priority = 0; /* required for correct WPA/11i MIC */
118 switch (sdata->vif.type) {
119 case NL80211_IFTYPE_AP_VLAN:
120 sta = rcu_dereference(sdata->u.vlan.sta);
125 case NL80211_IFTYPE_AP:
128 case NL80211_IFTYPE_WDS:
129 ra = sdata->u.wds.remote_addr;
131 #ifdef CONFIG_MAC80211_MESH
132 case NL80211_IFTYPE_MESH_POINT:
136 case NL80211_IFTYPE_STATION:
137 ra = sdata->u.mgd.bssid;
139 case NL80211_IFTYPE_ADHOC:
146 if (!sta && ra && !is_multicast_ether_addr(ra)) {
147 sta = sta_info_get(sdata, ra);
154 skb->priority = 0; /* required for correct WPA/11i MIC */
155 return IEEE80211_AC_BE;
158 if (skb->protocol == sdata->control_port_protocol) {
160 return ieee80211_downgrade_queue(sdata, skb);
163 /* use the data classifier to determine what 802.1d tag the
166 qos_map = rcu_dereference(sdata->qos_map);
167 skb->priority = cfg80211_classify8021d(skb, qos_map ?
168 &qos_map->qos_map : NULL);
171 return ieee80211_downgrade_queue(sdata, skb);
175 * ieee80211_set_qos_hdr - Fill in the QoS header if there is one.
177 * @sdata: local subif
178 * @skb: packet to be updated
180 void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
183 struct ieee80211_hdr *hdr = (void *)skb->data;
184 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
188 if (!ieee80211_is_data_qos(hdr->frame_control))
191 p = ieee80211_get_qos_ctl(hdr);
192 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
194 /* preserve EOSP bit */
195 ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
197 if (is_multicast_ether_addr(hdr->addr1) ||
198 sdata->noack_map & BIT(tid)) {
199 ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
200 info->flags |= IEEE80211_TX_CTL_NO_ACK;
203 /* qos header is 2 bytes */
204 *p++ = ack_policy | tid;
205 if (ieee80211_vif_is_mesh(&sdata->vif)) {
206 /* preserve RSPI and Mesh PS Level bit */
207 *p &= ((IEEE80211_QOS_CTL_RSPI |
208 IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8);
210 /* Nulls don't have a mesh header (frame body) */
211 if (!ieee80211_is_qos_nullfunc(hdr->frame_control))
212 *p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8);