// SPDX-License-Identifier: GPL-2.0 /* * S1G handling * Copyright(c) 2020 Adapt-IP * Copyright (C) 2023 Intel Corporation */ #include <linux/ieee80211.h> #include <net/mac80211.h> #include "ieee80211_i.h" #include "driver-ops.h" void ieee80211_s1g_sta_rate_init(struct sta_info *sta) { /* avoid indicating legacy bitrates for S1G STAs */ sta->deflink.tx_stats.last_rate.flags |= IEEE80211_TX_RC_S1G_MCS; sta->deflink.rx_stats.last_rate = STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_S1G); } bool ieee80211_s1g_is_twt_setup(struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; if (likely(!ieee80211_is_action(mgmt->frame_control))) return false; if (likely(mgmt->u.action.category != WLAN_CATEGORY_S1G)) return false; return mgmt->u.action.u.s1g.action_code == WLAN_S1G_TWT_SETUP; } static void ieee80211_s1g_send_twt_setup(struct ieee80211_sub_if_data *sdata, const u8 *da, const u8 *bssid, struct ieee80211_twt_setup *twt) { int len = IEEE80211_MIN_ACTION_SIZE + 4 + twt->length; struct ieee80211_local *local = sdata->local; struct ieee80211_mgmt *mgmt; struct sk_buff *skb; skb = dev_alloc_skb(local->hw.extra_tx_headroom + len); if (!skb) return; skb_reserve(skb, local->hw.extra_tx_headroom); mgmt = skb_put_zero(skb, len); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); memcpy(mgmt->da, da, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, bssid, ETH_ALEN); mgmt->u.action.category = WLAN_CATEGORY_S1G; mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_SETUP; memcpy(mgmt->u.action.u.s1g.variable, twt, 3 + twt->length); IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | IEEE80211_TX_INTFL_MLME_CONN_TX | IEEE80211_TX_CTL_REQ_TX_STATUS; ieee80211_tx_skb(sdata, skb); } static void ieee80211_s1g_send_twt_teardown(struct ieee80211_sub_if_data *sdata, const u8 *da, const u8 *bssid, u8 flowid) { struct ieee80211_local *local = sdata->local; struct ieee80211_mgmt *mgmt; struct sk_buff *skb; u8 *id; skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_MIN_ACTION_SIZE + 2); if (!skb) return; skb_reserve(skb, local->hw.extra_tx_headroom); mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE + 2); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION); memcpy(mgmt->da, da, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, bssid, ETH_ALEN); mgmt->u.action.category = WLAN_CATEGORY_S1G; mgmt->u.action.u.s1g.action_code = WLAN_S1G_TWT_TEARDOWN; id = (u8 *)mgmt->u.action.u.s1g.variable; *id = flowid; IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | IEEE80211_TX_CTL_REQ_TX_STATUS; ieee80211_tx_skb(sdata, skb); } static void ieee80211_s1g_rx_twt_setup(struct ieee80211_sub_if_data *sdata, struct sta_info *sta, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (void *)skb->data; struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable; struct ieee80211_twt_params *twt_agrt = (void *)twt->params; twt_agrt->req_type &= cpu_to_le16(~IEEE80211_TWT_REQTYPE_REQUEST); /* broadcast TWT not supported yet */ if (twt->control & IEEE80211_TWT_CONTROL_NEG_TYPE_BROADCAST) { twt_agrt->req_type &= ~cpu_to_le16(IEEE80211_TWT_REQTYPE_SETUP_CMD); twt_agrt->req_type |= le16_encode_bits(TWT_SETUP_CMD_REJECT, IEEE80211_TWT_REQTYPE_SETUP_CMD); goto out; } /* TWT Information not supported yet */ twt->control |= IEEE80211_TWT_CONTROL_RX_DISABLED; drv_add_twt_setup(sdata->local, sdata, &sta->sta, twt); out: ieee80211_s1g_send_twt_setup(sdata, mgmt->sa, sdata->vif.addr, twt); } static void ieee80211_s1g_rx_twt_teardown(struct ieee80211_sub_if_data *sdata, struct sta_info *sta, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; drv_twt_teardown_request(sdata->local, sdata, &sta->sta, mgmt->u.action.u.s1g.variable[0]); } static void ieee80211_s1g_tx_twt_setup_fail(struct ieee80211_sub_if_data *sdata, struct sta_info *sta, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; struct ieee80211_twt_setup *twt = (void *)mgmt->u.action.u.s1g.variable; struct ieee80211_twt_params *twt_agrt = (void *)twt->params; u8 flowid = le16_get_bits(twt_agrt->req_type, IEEE80211_TWT_REQTYPE_FLOWID); drv_twt_teardown_request(sdata->local, sdata, &sta->sta, flowid); ieee80211_s1g_send_twt_teardown(sdata, mgmt->sa, sdata->vif.addr, flowid); } void ieee80211_s1g_rx_twt_action(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; struct ieee80211_local *local = sdata->local; struct sta_info *sta; lockdep_assert_wiphy(local->hw.wiphy); sta = sta_info_get_bss(sdata, mgmt->sa); if (!sta) return; switch (mgmt->u.action.u.s1g.action_code) { case WLAN_S1G_TWT_SETUP: ieee80211_s1g_rx_twt_setup(sdata, sta, skb); break; case WLAN_S1G_TWT_TEARDOWN: ieee80211_s1g_rx_twt_teardown(sdata, sta, skb); break; default: break; } } void ieee80211_s1g_status_twt_action(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; struct ieee80211_local *local = sdata->local; struct sta_info *sta; lockdep_assert_wiphy(local->hw.wiphy); sta = sta_info_get_bss(sdata, mgmt->da); if (!sta) return; switch (mgmt->u.action.u.s1g.action_code) { case WLAN_S1G_TWT_SETUP: /* process failed twt setup frames */ ieee80211_s1g_tx_twt_setup_fail(sdata, sta, skb); break; default: break; } }