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 | ||
00e96dec | 55 | static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata, |
4670cf7a JB |
56 | struct sk_buff *skb) |
57 | { | |
58 | /* in case we are a client verify acm is not set for this ac */ | |
00e96dec | 59 | while (unlikely(sdata->wmm_acm & BIT(skb->priority))) { |
4670cf7a JB |
60 | if (wme_downgrade_ac(skb)) { |
61 | /* | |
62 | * This should not really happen. The AP has marked all | |
63 | * lower ACs to require admission control which is not | |
64 | * a reasonable configuration. Allow the frame to be | |
65 | * transmitted using AC_BK as a workaround. | |
66 | */ | |
67 | break; | |
68 | } | |
69 | } | |
70 | ||
71 | /* look up which queue to use for frames with this 1d tag */ | |
72 | return ieee802_1d_to_ac[skb->priority]; | |
73 | } | |
74 | ||
d3c1597b | 75 | /* Indicate which queue to use for this fully formed 802.11 frame */ |
00e96dec | 76 | u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata, |
d3c1597b TP |
77 | struct sk_buff *skb, |
78 | struct ieee80211_hdr *hdr) | |
79 | { | |
00e96dec | 80 | struct ieee80211_local *local = sdata->local; |
d3c1597b TP |
81 | u8 *p; |
82 | ||
32c5057b | 83 | if (local->hw.queues < IEEE80211_NUM_ACS) |
d3c1597b TP |
84 | return 0; |
85 | ||
86 | if (!ieee80211_is_data(hdr->frame_control)) { | |
87 | skb->priority = 7; | |
88 | return ieee802_1d_to_ac[skb->priority]; | |
89 | } | |
90 | if (!ieee80211_is_data_qos(hdr->frame_control)) { | |
91 | skb->priority = 0; | |
92 | return ieee802_1d_to_ac[skb->priority]; | |
93 | } | |
94 | ||
95 | p = ieee80211_get_qos_ctl(hdr); | |
96 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
97 | ||
00e96dec | 98 | return ieee80211_downgrade_queue(sdata, skb); |
d3c1597b | 99 | } |
f0706e82 | 100 | |
cf0277e7 JB |
101 | /* Indicate which queue to use. */ |
102 | u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata, | |
103 | struct sk_buff *skb) | |
f0706e82 | 104 | { |
cf0277e7 JB |
105 | struct ieee80211_local *local = sdata->local; |
106 | struct sta_info *sta = NULL; | |
cf0277e7 JB |
107 | const u8 *ra = NULL; |
108 | bool qos = false; | |
32db6b54 | 109 | struct mac80211_qos_map *qos_map; |
f0706e82 | 110 | |
32c5057b | 111 | if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) { |
cf0277e7 | 112 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
ded81f6b | 113 | return 0; |
cf0277e7 JB |
114 | } |
115 | ||
116 | rcu_read_lock(); | |
117 | switch (sdata->vif.type) { | |
118 | case NL80211_IFTYPE_AP_VLAN: | |
cf0277e7 | 119 | sta = rcu_dereference(sdata->u.vlan.sta); |
17212846 | 120 | if (sta) { |
a74a8c84 | 121 | qos = sta->sta.wme; |
cf0277e7 | 122 | break; |
17212846 | 123 | } |
cf0277e7 JB |
124 | case NL80211_IFTYPE_AP: |
125 | ra = skb->data; | |
126 | break; | |
127 | case NL80211_IFTYPE_WDS: | |
128 | ra = sdata->u.wds.remote_addr; | |
129 | break; | |
130 | #ifdef CONFIG_MAC80211_MESH | |
131 | case NL80211_IFTYPE_MESH_POINT: | |
d0ce1855 | 132 | qos = true; |
cf0277e7 JB |
133 | break; |
134 | #endif | |
135 | case NL80211_IFTYPE_STATION: | |
136 | ra = sdata->u.mgd.bssid; | |
137 | break; | |
138 | case NL80211_IFTYPE_ADHOC: | |
139 | ra = skb->data; | |
140 | break; | |
141 | default: | |
142 | break; | |
f0706e82 JB |
143 | } |
144 | ||
cf0277e7 JB |
145 | if (!sta && ra && !is_multicast_ether_addr(ra)) { |
146 | sta = sta_info_get(sdata, ra); | |
147 | if (sta) | |
a74a8c84 | 148 | qos = sta->sta.wme; |
f0706e82 | 149 | } |
cf0277e7 JB |
150 | rcu_read_unlock(); |
151 | ||
152 | if (!qos) { | |
f0706e82 | 153 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
17212846 | 154 | return IEEE80211_AC_BE; |
f0706e82 JB |
155 | } |
156 | ||
1bf4bbb4 FF |
157 | if (skb->protocol == sdata->control_port_protocol) { |
158 | skb->priority = 7; | |
159 | return ieee80211_downgrade_queue(sdata, skb); | |
160 | } | |
161 | ||
f0706e82 | 162 | /* use the data classifier to determine what 802.1d tag the |
3c3b00ca | 163 | * data frame has */ |
32db6b54 KP |
164 | rcu_read_lock(); |
165 | qos_map = rcu_dereference(sdata->qos_map); | |
166 | skb->priority = cfg80211_classify8021d(skb, qos_map ? | |
167 | &qos_map->qos_map : NULL); | |
168 | rcu_read_unlock(); | |
f0706e82 | 169 | |
00e96dec | 170 | return ieee80211_downgrade_queue(sdata, skb); |
cf0277e7 JB |
171 | } |
172 | ||
40aefedc MP |
173 | /** |
174 | * ieee80211_set_qos_hdr - Fill in the QoS header if there is one. | |
175 | * | |
176 | * @sdata: local subif | |
177 | * @skb: packet to be updated | |
178 | */ | |
2154c81c JC |
179 | void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata, |
180 | struct sk_buff *skb) | |
f0706e82 | 181 | { |
cf0277e7 | 182 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b53be792 | 183 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
40aefedc MP |
184 | u8 *p; |
185 | u8 ack_policy, tid; | |
cf0277e7 | 186 | |
40aefedc MP |
187 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
188 | return; | |
cf0277e7 | 189 | |
40aefedc MP |
190 | p = ieee80211_get_qos_ctl(hdr); |
191 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
68629c61 | 192 | |
40aefedc MP |
193 | /* preserve EOSP bit */ |
194 | ack_policy = *p & IEEE80211_QOS_CTL_EOSP; | |
b53be792 | 195 | |
40aefedc MP |
196 | if (is_multicast_ether_addr(hdr->addr1) || |
197 | sdata->noack_map & BIT(tid)) { | |
198 | ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK; | |
199 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
f0706e82 | 200 | } |
40aefedc MP |
201 | |
202 | /* qos header is 2 bytes */ | |
203 | *p++ = ack_policy | tid; | |
3f52b7e3 MP |
204 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
205 | /* preserve RSPI and Mesh PS Level bit */ | |
206 | *p &= ((IEEE80211_QOS_CTL_RSPI | | |
207 | IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8); | |
208 | ||
209 | /* Nulls don't have a mesh header (frame body) */ | |
210 | if (!ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
211 | *p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8); | |
212 | } else { | |
213 | *p = 0; | |
214 | } | |
f0706e82 | 215 | } |