1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * S1G handling
4 * Copyright(c) 2020 Adapt-IP
5 * Copyright (C) 2023 Intel Corporation
6 */
7 #include <linux/ieee80211.h>
8 #include <net/mac80211.h>
9 #include "ieee80211_i.h"
10 #include "driver-ops.h"
11
12 void ieee80211_s1g_sta_rate_init(struct sta_info *sta)
13 {
14 /* avoid indicating legacy bitrates for S1G STAs */
15 sta->deflink.tx_stats.last_rate.flags |= IEEE80211_TX_RC_S1G_MCS;
16 sta->deflink.rx_stats.last_rate =
17 STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_S1G);
18 }
19
20 bool ieee80211_s1g_is_twt_setup(struct sk_buff *skb)
21 {
22 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
23
24 if (likely(!ieee80211_is_action(mgmt->frame_control)))
25 return false;
26
27 if (likely(mgmt->u.action.category != WLAN_CATEGORY_S1G))
28 return false;
29
30 return mgmt->u.action.u.s1g.action_code == WLAN_S1G_TWT_SETUP;
31 }
32
33 static void
34 ieee80211_s1g_send_twt_setup(struct ieee80211_sub_if_data *sdata, const u8 *da,
35 const u8 *bssid, struct ieee80211_twt_setup *twt)
36 {
37 int len = IEEE80211_MIN_ACTION_SIZE + 4 + twt->length;
38 struct ieee80211_local *local = sdata->local;
39 struct ieee80211_mgmt *mgmt;
40 struct sk_buff *skb;
41
42 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
43 if (!skb)
44 return;
45
46 skb_reserve(skb, local->hw.extra_tx_headroom);
47 mgmt = skb_put_zero(skb, len);
48 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
49 IEEE80211_STYPE_ACTION);
50 memcpy(mgmt->da, da, ETH_ALEN);
51 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
52 memcpy(mgmt->bssid, bssid, ETH_ALEN);
53
54 mgmt->u.action.category = WLAN_CATEGORY_S1G;
55 mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_SETUP;
56 memcpy(mgmt->u.action.u.s1g.variable, twt, 3 + twt->length);
57
58 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
59 IEEE80211_TX_INTFL_MLME_CONN_TX |
60 IEEE80211_TX_CTL_REQ_TX_STATUS;
61 ieee80211_tx_skb(sdata, skb);
62 }
63
64 static void
65 ieee80211_s1g_send_twt_teardown(struct ieee80211_sub_if_data *sdata,
66 const u8 *da, const u8 *bssid, u8 flowid)
67 {
68 struct ieee80211_local *local = sdata->local;
69 struct ieee80211_mgmt *mgmt;
70 struct sk_buff *skb;
71 u8 *id;
72
73 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
74 IEEE80211_MIN_ACTION_SIZE + 2);
75 if (!skb)
76 return;
77
78 skb_reserve(skb, local->hw.extra_tx_headroom);
79 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE + 2);
80 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
81 IEEE80211_STYPE_ACTION);
82 memcpy(mgmt->da, da, ETH_ALEN);
83 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
84 memcpy(mgmt->bssid, bssid, ETH_ALEN);
85
86 mgmt->u.action.category = WLAN_CATEGORY_S1G;
87 mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_TEARDOWN;
88 id = (u8 *)mgmt->u.action.u.s1g.variable;
89 *id = flowid;
90
91 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
92 IEEE80211_TX_CTL_REQ_TX_STATUS;
93 ieee80211_tx_skb(sdata, skb);
94 }
95
96 static void
97 ieee80211_s1g_rx_twt_setup(struct ieee80211_sub_if_data *sdata,
98 struct sta_info *sta, struct sk_buff *skb)
99 {
100 struct ieee80211_mgmt *mgmt = (void *)skb->data;
101 struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable;
102 struct ieee80211_twt_params *twt_agrt = (void *)twt->params;
103
104 twt_agrt->req_type &= cpu_to_le16(~IEEE80211_TWT_REQTYPE_REQUEST);
105
106 /* broadcast TWT not supported yet */
107 if (twt->control & IEEE80211_TWT_CONTROL_NEG_TYPE_BROADCAST) {
108 twt_agrt->req_type &=
109 ~cpu_to_le16(IEEE80211_TWT_REQTYPE_SETUP_CMD);
110 twt_agrt->req_type |=
111 le16_encode_bits(TWT_SETUP_CMD_REJECT,
112 IEEE80211_TWT_REQTYPE_SETUP_CMD);
113 goto out;
114 }
115
116 /* TWT Information not supported yet */
117 twt->control |= IEEE80211_TWT_CONTROL_RX_DISABLED;
118
119 drv_add_twt_setup(sdata->local, sdata, &sta->sta, twt);
120 out:
121 ieee80211_s1g_send_twt_setup(sdata, mgmt->sa, sdata->vif.addr, twt);
122 }
123
124 static void
125 ieee80211_s1g_rx_twt_teardown(struct ieee80211_sub_if_data *sdata,
126 struct sta_info *sta, struct sk_buff *skb)
127 {
128 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
129
130 drv_twt_teardown_request(sdata->local, sdata, &sta->sta,
131 mgmt->u.action.u.s1g.variable[0]);
132 }
133
134 static void
135 ieee80211_s1g_tx_twt_setup_fail(struct ieee80211_sub_if_data *sdata,
136 struct sta_info *sta, struct sk_buff *skb)
137 {
138 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
139 struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable;
140 struct ieee80211_twt_params *twt_agrt = (void *)twt->params;
141 u8 flowid = le16_get_bits(twt_agrt->req_type,
142 IEEE80211_TWT_REQTYPE_FLOWID);
143
144 drv_twt_teardown_request(sdata->local, sdata, &sta->sta, flowid);
145
146 ieee80211_s1g_send_twt_teardown(sdata, mgmt->sa, sdata->vif.addr,
147 flowid);
148 }
149
150 void ieee80211_s1g_rx_twt_action(struct ieee80211_sub_if_data *sdata,
151 struct sk_buff *skb)
152 {
153 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
154 struct ieee80211_local *local = sdata->local;
155 struct sta_info *sta;
156
157 lockdep_assert_wiphy(local->hw.wiphy);
158
159 sta = sta_info_get_bss(sdata, mgmt->sa);
160 if (!sta)
161 return;
162
163 switch (mgmt->u.action.u.s1g.action_code) {
164 case WLAN_S1G_TWT_SETUP:
165 ieee80211_s1g_rx_twt_setup(sdata, sta, skb);
166 break;
167 case WLAN_S1G_TWT_TEARDOWN:
168 ieee80211_s1g_rx_twt_teardown(sdata, sta, skb);
169 break;
170 default:
171 break;
172 }
173 }
174
175 void ieee80211_s1g_status_twt_action(struct ieee80211_sub_if_data *sdata,
176 struct sk_buff *skb)
177 {
178 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
179 struct ieee80211_local *local = sdata->local;
180 struct sta_info *sta;
181
182 lockdep_assert_wiphy(local->hw.wiphy);
183
184 sta = sta_info_get_bss(sdata, mgmt->da);
185 if (!sta)
186 return;
187
188 switch (mgmt->u.action.u.s1g.action_code) {
189 case WLAN_S1G_TWT_SETUP:
190 /* process failed twt setup frames */
191 ieee80211_s1g_tx_twt_setup_fail(sdata, sta, skb);
192 break;
193 default:
194 break;
195 }
196 }
197
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