e31a16d6f6
The patch moves some utility functions from mac80211 to cfg80211. Because these functions are doing generic 802.11 operations so they are not mac80211 specific. The moving allows some fullmac drivers to be also benefit from these utility functions. Signed-off-by: Zhu Yi <yi.zhu@intel.com> Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
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* Copyright 2004, Instant802 Networks, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/module.h>
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#include <linux/if_arp.h>
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#include <linux/types.h>
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#include <net/ip.h>
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#include <net/pkt_sched.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "wme.h"
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/* Default mapping in classifier to work with default
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* queue setup.
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*/
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const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 };
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static int wme_downgrade_ac(struct sk_buff *skb)
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{
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switch (skb->priority) {
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case 6:
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case 7:
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skb->priority = 5; /* VO -> VI */
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return 0;
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case 4:
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case 5:
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skb->priority = 3; /* VI -> BE */
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return 0;
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case 0:
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case 3:
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skb->priority = 2; /* BE -> BK */
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return 0;
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default:
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return -1;
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}
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}
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/* Indicate which queue to use. */
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static u16 classify80211(struct ieee80211_local *local, struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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if (!ieee80211_is_data(hdr->frame_control)) {
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/* management frames go on AC_VO queue, but are sent
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* without QoS control fields */
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return 0;
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}
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if (0 /* injected */) {
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/* use AC from radiotap */
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}
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if (!ieee80211_is_data_qos(hdr->frame_control)) {
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skb->priority = 0; /* required for correct WPA/11i MIC */
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return ieee802_1d_to_ac[skb->priority];
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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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skb->priority = cfg80211_classify8021d(skb);
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/* in case we are a client verify acm is not set for this ac */
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while (unlikely(local->wmm_acm & BIT(skb->priority))) {
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if (wme_downgrade_ac(skb)) {
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/*
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* This should not really happen. The AP has marked all
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* lower ACs to require admission control which is not
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* a reasonable configuration. Allow the frame to be
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* transmitted using AC_BK as a workaround.
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*/
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break;
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}
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}
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/* look up which queue to use for frames with this 1d tag */
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return ieee802_1d_to_ac[skb->priority];
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}
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u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
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{
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struct ieee80211_master_priv *mpriv = netdev_priv(dev);
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struct ieee80211_local *local = mpriv->local;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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u16 queue;
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u8 tid;
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queue = classify80211(local, skb);
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if (unlikely(queue >= local->hw.queues))
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queue = local->hw.queues - 1;
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/*
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* Now we know the 1d priority, fill in the QoS header if
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* there is one (and we haven't done this before).
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*/
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if (!skb->requeue && ieee80211_is_data_qos(hdr->frame_control)) {
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u8 *p = ieee80211_get_qos_ctl(hdr);
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u8 ack_policy = 0;
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tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
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if (unlikely(local->wifi_wme_noack_test))
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ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK <<
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QOS_CONTROL_ACK_POLICY_SHIFT;
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/* qos header is 2 bytes, second reserved */
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*p++ = ack_policy | tid;
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*p = 0;
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}
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return queue;
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}
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