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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f0706e82 JB |
2 | /* |
3 | * Copyright 2004, Instant802 Networks, Inc. | |
d98ad83e | 4 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
bfd8403a | 5 | * Copyright (C) 2022 Intel Corporation |
f0706e82 JB |
6 | */ |
7 | ||
8 | #include <linux/netdevice.h> | |
9 | #include <linux/skbuff.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/if_arp.h> | |
12 | #include <linux/types.h> | |
13 | #include <net/ip.h> | |
14 | #include <net/pkt_sched.h> | |
15 | ||
16 | #include <net/mac80211.h> | |
17 | #include "ieee80211_i.h" | |
18 | #include "wme.h" | |
19 | ||
51cb6db0 | 20 | /* Default mapping in classifier to work with default |
e100bb64 JB |
21 | * queue setup. |
22 | */ | |
4bce22b9 JB |
23 | const int ieee802_1d_to_ac[8] = { |
24 | IEEE80211_AC_BE, | |
25 | IEEE80211_AC_BK, | |
26 | IEEE80211_AC_BK, | |
27 | IEEE80211_AC_BE, | |
28 | IEEE80211_AC_VI, | |
29 | IEEE80211_AC_VI, | |
30 | IEEE80211_AC_VO, | |
31 | IEEE80211_AC_VO | |
32 | }; | |
f0706e82 | 33 | |
51cb6db0 | 34 | static int wme_downgrade_ac(struct sk_buff *skb) |
f0706e82 JB |
35 | { |
36 | switch (skb->priority) { | |
37 | case 6: | |
38 | case 7: | |
39 | skb->priority = 5; /* VO -> VI */ | |
40 | return 0; | |
41 | case 4: | |
42 | case 5: | |
43 | skb->priority = 3; /* VI -> BE */ | |
44 | return 0; | |
45 | case 0: | |
46 | case 3: | |
47 | skb->priority = 2; /* BE -> BK */ | |
48 | return 0; | |
49 | default: | |
50 | return -1; | |
51 | } | |
52 | } | |
53 | ||
b6da911b LK |
54 | /** |
55 | * ieee80211_fix_reserved_tid - return the TID to use if this one is reserved | |
56 | * @tid: the assumed-reserved TID | |
57 | * | |
58 | * Returns: the alternative TID to use, or 0 on error | |
59 | */ | |
60 | static inline u8 ieee80211_fix_reserved_tid(u8 tid) | |
61 | { | |
62 | switch (tid) { | |
63 | case 0: | |
64 | return 3; | |
65 | case 1: | |
66 | return 2; | |
67 | case 2: | |
68 | return 1; | |
69 | case 3: | |
70 | return 0; | |
71 | case 4: | |
72 | return 5; | |
73 | case 5: | |
74 | return 4; | |
75 | case 6: | |
76 | return 7; | |
77 | case 7: | |
78 | return 6; | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
00e96dec | 84 | static u16 ieee80211_downgrade_queue(struct ieee80211_sub_if_data *sdata, |
02219b3a | 85 | struct sta_info *sta, struct sk_buff *skb) |
4670cf7a | 86 | { |
02219b3a JB |
87 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
88 | ||
4670cf7a | 89 | /* in case we are a client verify acm is not set for this ac */ |
02219b3a JB |
90 | while (sdata->wmm_acm & BIT(skb->priority)) { |
91 | int ac = ieee802_1d_to_ac[skb->priority]; | |
92 | ||
93 | if (ifmgd->tx_tspec[ac].admitted_time && | |
94 | skb->priority == ifmgd->tx_tspec[ac].up) | |
95 | return ac; | |
96 | ||
4670cf7a JB |
97 | if (wme_downgrade_ac(skb)) { |
98 | /* | |
99 | * This should not really happen. The AP has marked all | |
100 | * lower ACs to require admission control which is not | |
101 | * a reasonable configuration. Allow the frame to be | |
102 | * transmitted using AC_BK as a workaround. | |
103 | */ | |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
b6da911b LK |
108 | /* Check to see if this is a reserved TID */ |
109 | if (sta && sta->reserved_tid == skb->priority) | |
110 | skb->priority = ieee80211_fix_reserved_tid(skb->priority); | |
111 | ||
4670cf7a JB |
112 | /* look up which queue to use for frames with this 1d tag */ |
113 | return ieee802_1d_to_ac[skb->priority]; | |
114 | } | |
115 | ||
d3c1597b | 116 | /* Indicate which queue to use for this fully formed 802.11 frame */ |
00e96dec | 117 | u16 ieee80211_select_queue_80211(struct ieee80211_sub_if_data *sdata, |
d3c1597b TP |
118 | struct sk_buff *skb, |
119 | struct ieee80211_hdr *hdr) | |
120 | { | |
00e96dec | 121 | struct ieee80211_local *local = sdata->local; |
66d06c84 | 122 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
d3c1597b TP |
123 | u8 *p; |
124 | ||
107395f9 AW |
125 | /* Ensure hash is set prior to potential SW encryption */ |
126 | skb_get_hash(skb); | |
127 | ||
66d06c84 MV |
128 | if ((info->control.flags & IEEE80211_TX_CTRL_DONT_REORDER) || |
129 | local->hw.queues < IEEE80211_NUM_ACS) | |
d3c1597b TP |
130 | return 0; |
131 | ||
132 | if (!ieee80211_is_data(hdr->frame_control)) { | |
133 | skb->priority = 7; | |
134 | return ieee802_1d_to_ac[skb->priority]; | |
135 | } | |
136 | if (!ieee80211_is_data_qos(hdr->frame_control)) { | |
137 | skb->priority = 0; | |
138 | return ieee802_1d_to_ac[skb->priority]; | |
139 | } | |
140 | ||
141 | p = ieee80211_get_qos_ctl(hdr); | |
142 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
143 | ||
02219b3a | 144 | return ieee80211_downgrade_queue(sdata, NULL, skb); |
d3c1597b | 145 | } |
f0706e82 | 146 | |
107395f9 AW |
147 | u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata, |
148 | struct sta_info *sta, struct sk_buff *skb) | |
1974da8b | 149 | { |
4e348c6c | 150 | const struct ethhdr *eth = (void *)skb->data; |
1974da8b FF |
151 | struct mac80211_qos_map *qos_map; |
152 | bool qos; | |
153 | ||
107395f9 AW |
154 | /* Ensure hash is set prior to potential SW encryption */ |
155 | skb_get_hash(skb); | |
156 | ||
1974da8b | 157 | /* all mesh/ocb stations are required to support WME */ |
4e348c6c FF |
158 | if ((sdata->vif.type == NL80211_IFTYPE_MESH_POINT && |
159 | !is_multicast_ether_addr(eth->h_dest)) || | |
160 | (sdata->vif.type == NL80211_IFTYPE_OCB && sta)) | |
1974da8b FF |
161 | qos = true; |
162 | else if (sta) | |
163 | qos = sta->sta.wme; | |
164 | else | |
165 | qos = false; | |
166 | ||
f6ab25d4 | 167 | if (!qos) { |
1974da8b FF |
168 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
169 | return IEEE80211_AC_BE; | |
170 | } | |
171 | ||
172 | if (skb->protocol == sdata->control_port_protocol) { | |
173 | skb->priority = 7; | |
174 | goto downgrade; | |
175 | } | |
176 | ||
177 | /* use the data classifier to determine what 802.1d tag the | |
178 | * data frame has */ | |
179 | qos_map = rcu_dereference(sdata->qos_map); | |
180 | skb->priority = cfg80211_classify8021d(skb, qos_map ? | |
181 | &qos_map->qos_map : NULL); | |
182 | ||
183 | downgrade: | |
184 | return ieee80211_downgrade_queue(sdata, sta, skb); | |
185 | } | |
186 | ||
40aefedc MP |
187 | /** |
188 | * ieee80211_set_qos_hdr - Fill in the QoS header if there is one. | |
189 | * | |
190 | * @sdata: local subif | |
191 | * @skb: packet to be updated | |
192 | */ | |
2154c81c JC |
193 | void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata, |
194 | struct sk_buff *skb) | |
f0706e82 | 195 | { |
cf0277e7 | 196 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b53be792 | 197 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
32910bb9 JB |
198 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
199 | u8 flags; | |
40aefedc | 200 | u8 *p; |
cf0277e7 | 201 | |
40aefedc MP |
202 | if (!ieee80211_is_data_qos(hdr->frame_control)) |
203 | return; | |
cf0277e7 | 204 | |
40aefedc | 205 | p = ieee80211_get_qos_ctl(hdr); |
68629c61 | 206 | |
527d6759 MV |
207 | /* don't overwrite the QoS field of injected frames */ |
208 | if (info->flags & IEEE80211_TX_CTL_INJECTED) { | |
209 | /* do take into account Ack policy of injected frames */ | |
210 | if (*p & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) | |
211 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
212 | return; | |
213 | } | |
214 | ||
32910bb9 JB |
215 | /* set up the first byte */ |
216 | ||
217 | /* | |
218 | * preserve everything but the TID and ACK policy | |
219 | * (which we both write here) | |
220 | */ | |
221 | flags = *p & ~(IEEE80211_QOS_CTL_TID_MASK | | |
222 | IEEE80211_QOS_CTL_ACK_POLICY_MASK); | |
b53be792 | 223 | |
40aefedc MP |
224 | if (is_multicast_ether_addr(hdr->addr1) || |
225 | sdata->noack_map & BIT(tid)) { | |
32910bb9 | 226 | flags |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK; |
40aefedc | 227 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
f0706e82 | 228 | } |
40aefedc | 229 | |
32910bb9 JB |
230 | *p = flags | tid; |
231 | ||
232 | /* set up the second byte */ | |
233 | p++; | |
234 | ||
3f52b7e3 MP |
235 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
236 | /* preserve RSPI and Mesh PS Level bit */ | |
237 | *p &= ((IEEE80211_QOS_CTL_RSPI | | |
238 | IEEE80211_QOS_CTL_MESH_PS_LEVEL) >> 8); | |
239 | ||
240 | /* Nulls don't have a mesh header (frame body) */ | |
241 | if (!ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
242 | *p |= (IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT >> 8); | |
243 | } else { | |
244 | *p = 0; | |
245 | } | |
f0706e82 | 246 | } |