Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * Copyright 2004, Instant802 Networks, Inc. | |
3 | * | |
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. | |
7 | */ | |
8 | ||
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> | |
14 | #include <net/ip.h> | |
15 | #include <net/pkt_sched.h> | |
16 | ||
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "wme.h" | |
20 | ||
51cb6db0 | 21 | /* Default mapping in classifier to work with default |
e100bb64 JB |
22 | * queue setup. |
23 | */ | |
4bce22b9 JB |
24 | const int ieee802_1d_to_ac[8] = { |
25 | IEEE80211_AC_BE, | |
26 | IEEE80211_AC_BK, | |
27 | IEEE80211_AC_BK, | |
28 | IEEE80211_AC_BE, | |
29 | IEEE80211_AC_VI, | |
30 | IEEE80211_AC_VI, | |
31 | IEEE80211_AC_VO, | |
32 | IEEE80211_AC_VO | |
33 | }; | |
f0706e82 | 34 | |
51cb6db0 | 35 | static int wme_downgrade_ac(struct sk_buff *skb) |
f0706e82 JB |
36 | { |
37 | switch (skb->priority) { | |
38 | case 6: | |
39 | case 7: | |
40 | skb->priority = 5; /* VO -> VI */ | |
41 | return 0; | |
42 | case 4: | |
43 | case 5: | |
44 | skb->priority = 3; /* VI -> BE */ | |
45 | return 0; | |
46 | case 0: | |
47 | case 3: | |
48 | skb->priority = 2; /* BE -> BK */ | |
49 | return 0; | |
50 | default: | |
51 | return -1; | |
52 | } | |
53 | } | |
54 | ||
d3c1597b TP |
55 | /* Indicate which queue to use for this fully formed 802.11 frame */ |
56 | u16 ieee80211_select_queue_80211(struct ieee80211_local *local, | |
57 | struct sk_buff *skb, | |
58 | struct ieee80211_hdr *hdr) | |
59 | { | |
60 | u8 *p; | |
61 | ||
62 | if (local->hw.queues < 4) | |
63 | return 0; | |
64 | ||
65 | if (!ieee80211_is_data(hdr->frame_control)) { | |
66 | skb->priority = 7; | |
67 | return ieee802_1d_to_ac[skb->priority]; | |
68 | } | |
69 | if (!ieee80211_is_data_qos(hdr->frame_control)) { | |
70 | skb->priority = 0; | |
71 | return ieee802_1d_to_ac[skb->priority]; | |
72 | } | |
73 | ||
74 | p = ieee80211_get_qos_ctl(hdr); | |
75 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
76 | ||
77 | return ieee80211_downgrade_queue(local, skb); | |
78 | } | |
f0706e82 | 79 | |
cf0277e7 JB |
80 | /* Indicate which queue to use. */ |
81 | u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata, | |
82 | struct sk_buff *skb) | |
f0706e82 | 83 | { |
cf0277e7 JB |
84 | struct ieee80211_local *local = sdata->local; |
85 | struct sta_info *sta = NULL; | |
cf0277e7 JB |
86 | const u8 *ra = NULL; |
87 | bool qos = false; | |
f0706e82 | 88 | |
cf0277e7 JB |
89 | if (local->hw.queues < 4 || skb->len < 6) { |
90 | skb->priority = 0; /* required for correct WPA/11i MIC */ | |
17212846 | 91 | return min_t(u16, local->hw.queues - 1, IEEE80211_AC_BE); |
cf0277e7 JB |
92 | } |
93 | ||
94 | rcu_read_lock(); | |
95 | switch (sdata->vif.type) { | |
96 | case NL80211_IFTYPE_AP_VLAN: | |
cf0277e7 | 97 | sta = rcu_dereference(sdata->u.vlan.sta); |
17212846 | 98 | if (sta) { |
c2c98fde | 99 | qos = test_sta_flag(sta, WLAN_STA_WME); |
cf0277e7 | 100 | break; |
17212846 | 101 | } |
cf0277e7 JB |
102 | case NL80211_IFTYPE_AP: |
103 | ra = skb->data; | |
104 | break; | |
105 | case NL80211_IFTYPE_WDS: | |
106 | ra = sdata->u.wds.remote_addr; | |
107 | break; | |
108 | #ifdef CONFIG_MAC80211_MESH | |
109 | case NL80211_IFTYPE_MESH_POINT: | |
d0ce1855 | 110 | qos = true; |
cf0277e7 JB |
111 | break; |
112 | #endif | |
113 | case NL80211_IFTYPE_STATION: | |
114 | ra = sdata->u.mgd.bssid; | |
115 | break; | |
116 | case NL80211_IFTYPE_ADHOC: | |
117 | ra = skb->data; | |
118 | break; | |
119 | default: | |
120 | break; | |
f0706e82 JB |
121 | } |
122 | ||
cf0277e7 JB |
123 | if (!sta && ra && !is_multicast_ether_addr(ra)) { |
124 | sta = sta_info_get(sdata, ra); | |
125 | if (sta) | |
c2c98fde | 126 | qos = test_sta_flag(sta, WLAN_STA_WME); |
f0706e82 | 127 | } |
cf0277e7 JB |
128 | rcu_read_unlock(); |
129 | ||
130 | if (!qos) { | |
f0706e82 | 131 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
17212846 | 132 | return IEEE80211_AC_BE; |
f0706e82 JB |
133 | } |
134 | ||
135 | /* use the data classifier to determine what 802.1d tag the | |
3c3b00ca | 136 | * data frame has */ |
e31a16d6 | 137 | skb->priority = cfg80211_classify8021d(skb); |
f0706e82 | 138 | |
cf0277e7 JB |
139 | return ieee80211_downgrade_queue(local, skb); |
140 | } | |
141 | ||
142 | u16 ieee80211_downgrade_queue(struct ieee80211_local *local, | |
143 | struct sk_buff *skb) | |
144 | { | |
3c3b00ca | 145 | /* in case we are a client verify acm is not set for this ac */ |
f0706e82 JB |
146 | while (unlikely(local->wmm_acm & BIT(skb->priority))) { |
147 | if (wme_downgrade_ac(skb)) { | |
0eeb59fe JM |
148 | /* |
149 | * This should not really happen. The AP has marked all | |
150 | * lower ACs to require admission control which is not | |
151 | * a reasonable configuration. Allow the frame to be | |
152 | * transmitted using AC_BK as a workaround. | |
51cb6db0 | 153 | */ |
0eeb59fe | 154 | break; |
f0706e82 JB |
155 | } |
156 | } | |
157 | ||
158 | /* look up which queue to use for frames with this 1d tag */ | |
159 | return ieee802_1d_to_ac[skb->priority]; | |
160 | } | |
161 | ||
2154c81c JC |
162 | void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata, |
163 | struct sk_buff *skb) | |
f0706e82 | 164 | { |
cf0277e7 | 165 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b53be792 | 166 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
cf0277e7 JB |
167 | |
168 | /* Fill in the QoS header if there is one. */ | |
8f77f384 | 169 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
002aaf4e | 170 | u8 *p = ieee80211_get_qos_ctl(hdr); |
68629c61 | 171 | u8 ack_policy, tid; |
cf0277e7 | 172 | |
238f74a2 | 173 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
cf0277e7 | 174 | |
68629c61 JB |
175 | /* preserve EOSP bit */ |
176 | ack_policy = *p & IEEE80211_QOS_CTL_EOSP; | |
177 | ||
b53be792 SW |
178 | if (is_multicast_ether_addr(hdr->addr1) || |
179 | sdata->noack_map & BIT(tid)) { | |
04b7dcf9 | 180 | ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK; |
b53be792 SW |
181 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
182 | } | |
183 | ||
2154c81c | 184 | /* qos header is 2 bytes */ |
002aaf4e | 185 | *p++ = ack_policy | tid; |
2154c81c JC |
186 | *p = ieee80211_vif_is_mesh(&sdata->vif) ? |
187 | (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8) : 0; | |
f0706e82 | 188 | } |
f0706e82 | 189 | } |