284 lines
6.2 KiB
C
284 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright 2004, Instant802 Networks, Inc.
|
|
* Copyright 2013-2014 Intel Mobile Communications GmbH
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/module.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/types.h>
|
|
#include <net/ip.h>
|
|
#include <net/pkt_sched.h>
|
|
|
|
#include <net/mac80211.h>
|
|
#include "ieee80211_i.h"
|
|
#include "wme.h"
|
|
|
|
/* Default mapping in classifier to work with default
|
|
* queue setup.
|
|
*/
|
|
const int ieee802_1d_to_ac[8] = {
|
|
IEEE80211_AC_BE,
|
|
IEEE80211_AC_BK,
|
|
IEEE80211_AC_BK,
|
|
IEEE80211_AC_BE,
|
|
IEEE80211_AC_VI,
|
|
IEEE80211_AC_VI,
|
|
IEEE80211_AC_VO,
|
|
IEEE80211_AC_VO
|
|
};
|
|
|
|
static int wme_downgrade_ac(struct sk_buff *skb)
|
|
{
|
|
switch (skb->priority) {
|
|
case 6:
|
|
case 7:
|
|
skb->priority = 5; /* VO -> VI */
|
|
return 0;
|
|
case 4:
|
|
case 5:
|
|
skb->priority = 3; /* VI -> BE */
|
|
return 0;
|
|
case 0:
|
|
case 3:
|
|
skb->priority = 2; /* BE -> BK */
|
|
return 0;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ieee80211_fix_reserved_tid - return the TID to use if this one is reserved
|
|
* @tid: the assumed-reserved TID
|
|
*
|
|
* Returns: the alternative TID to use, or 0 on error
|
|
*/
|
|
static inline u8 ieee80211_fix_reserved_tid(u8 tid)
|
|
{
|
|
switch (tid) {
|
|
case 0:
|
|
return 3;
|
|
case 1:
|
|
return 2;
|
|
case 2:
|
|
return 1;
|
|
case 3:
|
|
return 0;
|
|
case 4:
|
|
return 5;
|
|
case 5:
|
|
return 4;
|
|
case 6:
|
|
return 7;
|
|
case 7:
|
|
return 6;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
|
|
/* in case we are a client verify acm is not set for this ac */
|
|
while (sdata->wmm_acm & BIT(skb->priority)) {
|
|
int ac = ieee802_1d_to_ac[skb->priority];
|
|
|
|
if (ifmgd->tx_tspec[ac].admitted_time &&
|
|
skb->priority == ifmgd->tx_tspec[ac].up)
|
|
return ac;
|
|
|
|
if (wme_downgrade_ac(skb)) {
|
|
/*
|
|
* This should not really happen. The AP has marked all
|
|
* lower ACs to require admission control which is not
|
|
* a reasonable configuration. Allow the frame to be
|
|
* transmitted using AC_BK as a workaround.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check to see if this is a reserved TID */
|
|
if (sta && sta->reserved_tid == skb->priority)
|
|
skb->priority = ieee80211_fix_reserved_tid(skb->priority);
|
|
|
|
/* look up which queue to use for frames with this 1d tag */
|
|
return ieee802_1d_to_ac[skb->priority];
|
|
}
|
|
|
|
/* Indicate which queue to use for this fully formed 802.11 frame */
|
|
u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_hdr *hdr)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
u8 *p;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS)
|
|
return 0;
|
|
|
|
if (!ieee80211_is_data(hdr->frame_control)) {
|
|
skb->priority = 7;
|
|
return ieee802_1d_to_ac[skb->priority];
|
|
}
|
|
if (!ieee80211_is_data_qos(hdr->frame_control)) {
|
|
skb->priority = 0;
|
|
return ieee802_1d_to_ac[skb->priority];
|
|
}
|
|
|
|
p = ieee80211_get_qos_ctl(hdr);
|
|
skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
|
|
|
|
return ieee80211_downgrade_queue(sdata, NULL, skb);
|
|
}
|
|
|
|
u16 __ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta, struct sk_buff *skb)
|
|
{
|
|
struct mac80211_qos_map *qos_map;
|
|
bool qos;
|
|
|
|
/* all mesh/ocb stations are required to support WME */
|
|
if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
|
|
sdata->vif.type == NL80211_IFTYPE_OCB)
|
|
qos = true;
|
|
else if (sta)
|
|
qos = sta->sta.wme;
|
|
else
|
|
qos = false;
|
|
|
|
if (!qos) {
|
|
skb->priority = 0; /* required for correct WPA/11i MIC */
|
|
return IEEE80211_AC_BE;
|
|
}
|
|
|
|
if (skb->protocol == sdata->control_port_protocol) {
|
|
skb->priority = 7;
|
|
goto downgrade;
|
|
}
|
|
|
|
/* use the data classifier to determine what 802.1d tag the
|
|
* data frame has */
|
|
qos_map = rcu_dereference(sdata->qos_map);
|
|
skb->priority = cfg80211_classify8021d(skb, qos_map ?
|
|
&qos_map->qos_map : NULL);
|
|
|
|
downgrade:
|
|
return ieee80211_downgrade_queue(sdata, sta, skb);
|
|
}
|
|
|
|
|
|
/* Indicate which queue to use. */
|
|
u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta = NULL;
|
|
const u8 *ra = NULL;
|
|
u16 ret;
|
|
|
|
/* when using iTXQ, we can do this later */
|
|
if (local->ops->wake_tx_queue)
|
|
return 0;
|
|
|
|
if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) {
|
|
skb->priority = 0; /* required for correct WPA/11i MIC */
|
|
return 0;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
sta = rcu_dereference(sdata->u.vlan.sta);
|
|
if (sta)
|
|
break;
|
|
fallthrough;
|
|
case NL80211_IFTYPE_AP:
|
|
ra = skb->data;
|
|
break;
|
|
case NL80211_IFTYPE_WDS:
|
|
ra = sdata->u.wds.remote_addr;
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
/* might be a TDLS station */
|
|
sta = sta_info_get(sdata, skb->data);
|
|
if (sta)
|
|
break;
|
|
|
|
ra = sdata->u.mgd.bssid;
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ra = skb->data;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!sta && ra && !is_multicast_ether_addr(ra))
|
|
sta = sta_info_get(sdata, ra);
|
|
|
|
ret = __ieee80211_select_queue(sdata, sta, skb);
|
|
|
|
rcu_read_unlock();
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_set_qos_hdr - Fill in the QoS header if there is one.
|
|
*
|
|
* @sdata: local subif
|
|
* @skb: packet to be updated
|
|
*/
|
|
void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_hdr *hdr = (void *)skb->data;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
|
|
u8 flags;
|
|
u8 *p;
|
|
|
|
if (!ieee80211_is_data_qos(hdr->frame_control))
|
|
return;
|
|
|
|
p = ieee80211_get_qos_ctl(hdr);
|
|
|
|
/* set up the first byte */
|
|
|
|
/*
|
|
* preserve everything but the TID and ACK policy
|
|
* (which we both write here)
|
|
*/
|
|
flags = *p & ~(IEEE80211_QOS_CTL_TID_MASK |
|
|
IEEE80211_QOS_CTL_ACK_POLICY_MASK);
|
|
|
|
if (is_multicast_ether_addr(hdr->addr1) ||
|
|
sdata->noack_map & BIT(tid)) {
|
|
flags |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
|
|
info->flags |= IEEE80211_TX_CTL_NO_ACK;
|
|
}
|
|
|
|
*p = flags | tid;
|
|
|
|
/* set up the second byte */
|
|
p++;
|
|
|
|
if (ieee80211_vif_is_mesh(&sdata->vif)) {
|
|
/* preserve RSPI and Mesh PS Level bit */
|
|
*p &= ((IEEE80211_QOS_CTL_RSPI |
|
|
IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8);
|
|
|
|
/* Nulls don't have a mesh header (frame body) */
|
|
if (!ieee80211_is_qos_nullfunc(hdr->frame_control))
|
|
*p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8);
|
|
} else {
|
|
*p = 0;
|
|
}
|
|
}
|