]>
Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * Copyright 2004, Instant802 Networks, Inc. | |
d98ad83e | 3 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
f0706e82 JB |
4 | * |
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. | |
8 | */ | |
9 | ||
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> | |
15 | #include <net/ip.h> | |
16 | #include <net/pkt_sched.h> | |
17 | ||
18 | #include <net/mac80211.h> | |
19 | #include "ieee80211_i.h" | |
20 | #include "wme.h" | |
21 | ||
51cb6db0 | 22 | /* Default mapping in classifier to work with default |
e100bb64 JB |
23 | * queue setup. |
24 | */ | |
4bce22b9 JB |
25 | const int ieee802_1d_to_ac[8] = { |
26 | IEEE80211_AC_BE, | |
27 | IEEE80211_AC_BK, | |
28 | IEEE80211_AC_BK, | |
29 | IEEE80211_AC_BE, | |
30 | IEEE80211_AC_VI, | |
31 | IEEE80211_AC_VI, | |
32 | IEEE80211_AC_VO, | |
33 | IEEE80211_AC_VO | |
34 | }; | |
f0706e82 | 35 | |
51cb6db0 | 36 | static int wme_downgrade_ac(struct sk_buff *skb) |
f0706e82 JB |
37 | { |
38 | switch (skb->priority) { | |
39 | case 6: | |
40 | case 7: | |
41 | skb->priority = 5; /* VO -> VI */ | |
42 | return 0; | |
43 | case 4: | |
44 | case 5: | |
45 | skb->priority = 3; /* VI -> BE */ | |
46 | return 0; | |
47 | case 0: | |
48 | case 3: | |
49 | skb->priority = 2; /* BE -> BK */ | |
50 | return 0; | |
51 | default: | |
52 | return -1; | |
53 | } | |
54 | } | |
55 | ||
b6da911b LK |
56 | /** |
57 | * ieee80211_fix_reserved_tid - return the TID to use if this one is reserved | |
58 | * @tid: the assumed-reserved TID | |
59 | * | |
60 | * Returns: the alternative TID to use, or 0 on error | |
61 | */ | |
62 | static inline u8 ieee80211_fix_reserved_tid(u8 tid) | |
63 | { | |
64 | switch (tid) { | |
65 | case 0: | |
66 | return 3; | |
67 | case 1: | |
68 | return 2; | |
69 | case 2: | |
70 | return 1; | |
71 | case 3: | |
72 | return 0; | |
73 | case 4: | |
74 | return 5; | |
75 | case 5: | |
76 | return 4; | |
77 | case 6: | |
78 | return 7; | |
79 | case 7: | |
80 | return 6; | |
81 | } | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
00e96dec | 86 | static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata, |
02219b3a | 87 | struct sta_info *sta, struct sk_buff *skb) |
4670cf7a | 88 | { |
02219b3a JB |
89 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
90 | ||
4670cf7a | 91 | /* in case we are a client verify acm is not set for this ac */ |
02219b3a JB |
92 | while (sdata->wmm_acm & BIT(skb->priority)) { |
93 | int ac = ieee802_1d_to_ac[skb->priority]; | |
94 | ||
95 | if (ifmgd->tx_tspec[ac].admitted_time && | |
96 | skb->priority == ifmgd->tx_tspec[ac].up) | |
97 | return ac; | |
98 | ||
4670cf7a JB |
99 | if (wme_downgrade_ac(skb)) { |
100 | /* | |
101 | * This should not really happen. The AP has marked all | |
102 | * lower ACs to require admission control which is not | |
103 | * a reasonable configuration. Allow the frame to be | |
104 | * transmitted using AC_BK as a workaround. | |
105 | */ | |
106 | break; | |
107 | } | |
108 | } | |
109 | ||
b6da911b LK |
110 | /* Check to see if this is a reserved TID */ |
111 | if (sta && sta->reserved_tid == skb->priority) | |
112 | skb->priority = ieee80211_fix_reserved_tid(skb->priority); | |
113 | ||
4670cf7a JB |
114 | /* look up which queue to use for frames with this 1d tag */ |
115 | return ieee802_1d_to_ac[skb->priority]; | |
116 | } | |
117 | ||
d3c1597b | 118 | /* Indicate which queue to use for this fully formed 802.11 frame */ |
00e96dec | 119 | u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata, |
d3c1597b TP |
120 | struct sk_buff *skb, |
121 | struct ieee80211_hdr *hdr) | |
122 | { | |
00e96dec | 123 | struct ieee80211_local *local = sdata->local; |
d3c1597b TP |
124 | u8 *p; |
125 | ||
32c5057b | 126 | if (local->hw.queues < IEEE80211_NUM_ACS) |
d3c1597b TP |
127 | return 0; |
128 | ||
129 | if (!ieee80211_is_data(hdr->frame_control)) { | |
130 | skb->priority = 7; | |
131 | return ieee802_1d_to_ac[skb->priority]; | |
132 | } | |
133 | if (!ieee80211_is_data_qos(hdr->frame_control)) { | |
134 | skb->priority = 0; | |
135 | return ieee802_1d_to_ac[skb->priority]; | |
136 | } | |
137 | ||
138 | p = ieee80211_get_qos_ctl(hdr); | |
139 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
140 | ||
02219b3a | 141 | return ieee80211_downgrade_queue(sdata, NULL, skb); |
d3c1597b | 142 | } |
f0706e82 | 143 | |
cf0277e7 JB |
144 | /* Indicate which queue to use. */ |
145 | u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata, | |
146 | struct sk_buff *skb) | |
f0706e82 | 147 | { |
cf0277e7 JB |
148 | struct ieee80211_local *local = sdata->local; |
149 | struct sta_info *sta = NULL; | |
cf0277e7 JB |
150 | const u8 *ra = NULL; |
151 | bool qos = false; | |
32db6b54 | 152 | struct mac80211_qos_map *qos_map; |
02219b3a | 153 | u16 ret; |
f0706e82 | 154 | |
32c5057b | 155 | if (local->hw.queues < IEEE80211_NUM_ACS || skb->len < 6) { |
cf0277e7 | 156 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
ded81f6b | 157 | return 0; |
cf0277e7 JB |
158 | } |
159 | ||
160 | rcu_read_lock(); | |
161 | switch (sdata->vif.type) { | |
162 | case NL80211_IFTYPE_AP_VLAN: | |
cf0277e7 | 163 | sta = rcu_dereference(sdata->u.vlan.sta); |
17212846 | 164 | if (sta) { |
a74a8c84 | 165 | qos = sta->sta.wme; |
cf0277e7 | 166 | break; |
17212846 | 167 | } |
cf0277e7 JB |
168 | case NL80211_IFTYPE_AP: |
169 | ra = skb->data; | |
170 | break; | |
171 | case NL80211_IFTYPE_WDS: | |
172 | ra = sdata->u.wds.remote_addr; | |
173 | break; | |
174 | #ifdef CONFIG_MAC80211_MESH | |
175 | case NL80211_IFTYPE_MESH_POINT: | |
d0ce1855 | 176 | qos = true; |
cf0277e7 JB |
177 | break; |
178 | #endif | |
179 | case NL80211_IFTYPE_STATION: | |
b6da911b LK |
180 | /* might be a TDLS station */ |
181 | sta = sta_info_get(sdata, skb->data); | |
182 | if (sta) | |
183 | qos = sta->sta.wme; | |
184 | ||
cf0277e7 JB |
185 | ra = sdata->u.mgd.bssid; |
186 | break; | |
187 | case NL80211_IFTYPE_ADHOC: | |
188 | ra = skb->data; | |
189 | break; | |
239281f8 RL |
190 | case NL80211_IFTYPE_OCB: |
191 | /* all stations are required to support WME */ | |
192 | qos = true; | |
193 | break; | |
cf0277e7 JB |
194 | default: |
195 | break; | |
f0706e82 JB |
196 | } |
197 | ||
cf0277e7 JB |
198 | if (!sta && ra && !is_multicast_ether_addr(ra)) { |
199 | sta = sta_info_get(sdata, ra); | |
200 | if (sta) | |
a74a8c84 | 201 | qos = sta->sta.wme; |
f0706e82 | 202 | } |
cf0277e7 JB |
203 | |
204 | if (!qos) { | |
f0706e82 | 205 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
02219b3a JB |
206 | ret = IEEE80211_AC_BE; |
207 | goto out; | |
f0706e82 JB |
208 | } |
209 | ||
1bf4bbb4 FF |
210 | if (skb->protocol == sdata->control_port_protocol) { |
211 | skb->priority = 7; | |
02219b3a | 212 | goto downgrade; |
1bf4bbb4 FF |
213 | } |
214 | ||
f0706e82 | 215 | /* use the data classifier to determine what 802.1d tag the |
3c3b00ca | 216 | * data frame has */ |
32db6b54 KP |
217 | qos_map = rcu_dereference(sdata->qos_map); |
218 | skb->priority = cfg80211_classify8021d(skb, qos_map ? | |
219 | &qos_map->qos_map : NULL); | |
f0706e82 | 220 | |
02219b3a JB |
221 | downgrade: |
222 | ret = ieee80211_downgrade_queue(sdata, sta, skb); | |
223 | out: | |
224 | rcu_read_unlock(); | |
225 | return ret; | |
cf0277e7 JB |
226 | } |
227 | ||
40aefedc MP |
228 | /** |
229 | * ieee80211_set_qos_hdr - Fill in the QoS header if there is one. | |
230 | * | |
231 | * @sdata: local subif | |
232 | * @skb: packet to be updated | |
233 | */ | |
2154c81c JC |
234 | void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata, |
235 | struct sk_buff *skb) | |
f0706e82 | 236 | { |
cf0277e7 | 237 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b53be792 | 238 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
32910bb9 JB |
239 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
240 | u8 flags; | |
40aefedc | 241 | u8 *p; |
cf0277e7 | 242 | |
40aefedc MP |
243 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
244 | return; | |
cf0277e7 | 245 | |
40aefedc | 246 | p = ieee80211_get_qos_ctl(hdr); |
68629c61 | 247 | |
32910bb9 JB |
248 | /* set up the first byte */ |
249 | ||
250 | /* | |
251 | * preserve everything but the TID and ACK policy | |
252 | * (which we both write here) | |
253 | */ | |
254 | flags = *p & ~(IEEE80211_QOS_CTL_TID_MASK | | |
255 | IEEE80211_QOS_CTL_ACK_POLICY_MASK); | |
b53be792 | 256 | |
40aefedc MP |
257 | if (is_multicast_ether_addr(hdr->addr1) || |
258 | sdata->noack_map & BIT(tid)) { | |
32910bb9 | 259 | flags |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK; |
40aefedc | 260 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
f0706e82 | 261 | } |
40aefedc | 262 | |
32910bb9 JB |
263 | *p = flags | tid; |
264 | ||
265 | /* set up the second byte */ | |
266 | p++; | |
267 | ||
3f52b7e3 MP |
268 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
269 | /* preserve RSPI and Mesh PS Level bit */ | |
270 | *p &= ((IEEE80211_QOS_CTL_RSPI | | |
271 | IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8); | |
272 | ||
273 | /* Nulls don't have a mesh header (frame body) */ | |
274 | if (!ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
275 | *p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8); | |
276 | } else { | |
277 | *p = 0; | |
278 | } | |
f0706e82 | 279 | } |