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