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,
57 struct sta_info *sta, struct sk_buff *skb)
59 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
61 /* in case we are a client verify acm is not set for this ac */
62 while (sdata->wmm_acm & BIT(skb->priority)) {
63 int ac = ieee802_1d_to_ac[skb->priority];
65 if (ifmgd->tx_tspec[ac].admitted_time &&
66 skb->priority == ifmgd->tx_tspec[ac].up)
69 if (wme_downgrade_ac(skb)) {
71 * This should not really happen. The AP has marked all
72 * lower ACs to require admission control which is not
73 * a reasonable configuration. Allow the frame to be
74 * transmitted using AC_BK as a workaround.
80 /* look up which queue to use for frames with this 1d tag */
81 return ieee802_1d_to_ac[skb->priority];
84 /* Indicate which queue to use for this fully formed 802.11 frame */
85 u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
87 struct ieee80211_hdr *hdr)
89 struct ieee80211_local *local = sdata->local;
92 if (local->hw.queues < IEEE80211_NUM_ACS)
95 if (!ieee80211_is_data(hdr->frame_control)) {
97 return ieee802_1d_to_ac[skb->priority];
99 if (!ieee80211_is_data_qos(hdr->frame_control)) {
101 return ieee802_1d_to_ac[skb->priority];
104 p = ieee80211_get_qos_ctl(hdr);
105 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
107 return ieee80211_downgrade_queue(sdata, NULL, skb);
110 /* Indicate which queue to use. */
111 u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
114 struct ieee80211_local *local = sdata->local;
115 struct sta_info *sta = NULL;
118 struct mac80211_qos_map *qos_map;
121 if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) {
122 skb->priority = 0; /* required for correct WPA/11i MIC */
127 switch (sdata->vif.type) {
128 case NL80211_IFTYPE_AP_VLAN:
129 sta = rcu_dereference(sdata->u.vlan.sta);
134 case NL80211_IFTYPE_AP:
137 case NL80211_IFTYPE_WDS:
138 ra = sdata->u.wds.remote_addr;
140 #ifdef CONFIG_MAC80211_MESH
141 case NL80211_IFTYPE_MESH_POINT:
145 case NL80211_IFTYPE_STATION:
146 ra = sdata->u.mgd.bssid;
148 case NL80211_IFTYPE_ADHOC:
151 case NL80211_IFTYPE_OCB:
152 /* all stations are required to support WME */
159 if (!sta && ra && !is_multicast_ether_addr(ra)) {
160 sta = sta_info_get(sdata, ra);
166 skb->priority = 0; /* required for correct WPA/11i MIC */
167 ret = IEEE80211_AC_BE;
171 if (skb->protocol == sdata->control_port_protocol) {
176 /* use the data classifier to determine what 802.1d tag the
178 qos_map = rcu_dereference(sdata->qos_map);
179 skb->priority = cfg80211_classify8021d(skb, qos_map ?
180 &qos_map->qos_map : NULL);
183 ret = ieee80211_downgrade_queue(sdata, sta, skb);
190 * ieee80211_set_qos_hdr - Fill in the QoS header if there is one.
192 * @sdata: local subif
193 * @skb: packet to be updated
195 void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
198 struct ieee80211_hdr *hdr = (void *)skb->data;
199 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
203 if (!ieee80211_is_data_qos(hdr->frame_control))
206 p = ieee80211_get_qos_ctl(hdr);
207 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
209 /* preserve EOSP bit */
210 ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
212 if (is_multicast_ether_addr(hdr->addr1) ||
213 sdata->noack_map & BIT(tid)) {
214 ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
215 info->flags |= IEEE80211_TX_CTL_NO_ACK;
218 /* qos header is 2 bytes */
219 *p++ = ack_policy | tid;
220 if (ieee80211_vif_is_mesh(&sdata->vif)) {
221 /* preserve RSPI and Mesh PS Level bit */
222 *p &= ((IEEE80211_QOS_CTL_RSPI |
223 IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8);
225 /* Nulls don't have a mesh header (frame body) */
226 if (!ieee80211_is_qos_nullfunc(hdr->frame_control))
227 *p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8);