1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. 4 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. 5 */ 6 7 #include <net/mac80211.h> 8 #include "core.h" 9 #include "mac.h" 10 #include "p2p.h" 11 12 static void ath12k_p2p_noa_ie_fill(u8 *data, size_t len, 13 const struct ath12k_wmi_p2p_noa_info *noa) 14 { 15 struct ieee80211_p2p_noa_attr *noa_attr; 16 u8 ctwindow = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_CTWIN_TU); 17 bool oppps = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS); 18 __le16 *noa_attr_len; 19 u16 attr_len; 20 u8 noa_descriptors = le32_get_bits(noa->noa_attr, 21 WMI_P2P_NOA_INFO_DESC_NUM); 22 int i; 23 24 /* P2P IE */ 25 data[0] = WLAN_EID_VENDOR_SPECIFIC; 26 data[1] = len - 2; 27 data[2] = (WLAN_OUI_WFA >> 16) & 0xff; 28 data[3] = (WLAN_OUI_WFA >> 8) & 0xff; 29 data[4] = (WLAN_OUI_WFA >> 0) & 0xff; 30 data[5] = WLAN_OUI_TYPE_WFA_P2P; 31 32 /* NOA ATTR */ 33 data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE; 34 noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */ 35 noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9]; 36 37 noa_attr->index = le32_get_bits(noa->noa_attr, 38 WMI_P2P_NOA_INFO_INDEX); 39 noa_attr->oppps_ctwindow = ctwindow; 40 if (oppps) 41 noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT; 42 43 for (i = 0; i < noa_descriptors; i++) { 44 noa_attr->desc[i].count = 45 __le32_to_cpu(noa->descriptors[i].type_count); 46 noa_attr->desc[i].duration = noa->descriptors[i].duration; 47 noa_attr->desc[i].interval = noa->descriptors[i].interval; 48 noa_attr->desc[i].start_time = noa->descriptors[i].start_time; 49 } 50 51 attr_len = 2; /* index + oppps_ctwindow */ 52 attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 53 *noa_attr_len = __cpu_to_le16(attr_len); 54 } 55 56 static size_t ath12k_p2p_noa_ie_len_compute(const struct ath12k_wmi_p2p_noa_info *noa) 57 { 58 size_t len = 0; 59 60 if (!(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM)) && 61 !(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS))) 62 return 0; 63 64 len += 1 + 1 + 4; /* EID + len + OUI */ 65 len += 1 + 2; /* noa attr + attr len */ 66 len += 1 + 1; /* index + oppps_ctwindow */ 67 len += le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM) * 68 sizeof(struct ieee80211_p2p_noa_desc); 69 70 return len; 71 } 72 73 static void ath12k_p2p_noa_ie_assign(struct ath12k_link_vif *arvif, void *ie, 74 size_t len) 75 { 76 struct ath12k *ar = arvif->ar; 77 78 lockdep_assert_held(&ar->data_lock); 79 80 kfree(arvif->ahvif->u.ap.noa_data); 81 82 arvif->ahvif->u.ap.noa_data = ie; 83 arvif->ahvif->u.ap.noa_len = len; 84 } 85 86 static void __ath12k_p2p_noa_update(struct ath12k_link_vif *arvif, 87 const struct ath12k_wmi_p2p_noa_info *noa) 88 { 89 struct ath12k *ar = arvif->ar; 90 void *ie; 91 size_t len; 92 93 lockdep_assert_held(&ar->data_lock); 94 95 ath12k_p2p_noa_ie_assign(arvif, NULL, 0); 96 97 len = ath12k_p2p_noa_ie_len_compute(noa); 98 if (!len) 99 return; 100 101 ie = kmalloc(len, GFP_ATOMIC); 102 if (!ie) 103 return; 104 105 ath12k_p2p_noa_ie_fill(ie, len, noa); 106 ath12k_p2p_noa_ie_assign(arvif, ie, len); 107 } 108 109 void ath12k_p2p_noa_update(struct ath12k_link_vif *arvif, 110 const struct ath12k_wmi_p2p_noa_info *noa) 111 { 112 struct ath12k *ar = arvif->ar; 113 114 spin_lock_bh(&ar->data_lock); 115 __ath12k_p2p_noa_update(arvif, noa); 116 spin_unlock_bh(&ar->data_lock); 117 } 118 119 static void ath12k_p2p_noa_update_vdev_iter(void *data, u8 *mac, 120 struct ieee80211_vif *vif) 121 { 122 struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif); 123 struct ath12k_p2p_noa_arg *arg = data; 124 struct ath12k_link_vif *arvif; 125 126 WARN_ON(!rcu_read_lock_any_held()); 127 arvif = &ahvif->deflink; 128 if (!arvif->is_created || arvif->ar != arg->ar || arvif->vdev_id != arg->vdev_id) 129 return; 130 131 ath12k_p2p_noa_update(arvif, arg->noa); 132 } 133 134 void ath12k_p2p_noa_update_by_vdev_id(struct ath12k *ar, u32 vdev_id, 135 const struct ath12k_wmi_p2p_noa_info *noa) 136 { 137 struct ath12k_p2p_noa_arg arg = { 138 .vdev_id = vdev_id, 139 .ar = ar, 140 .noa = noa, 141 }; 142 143 ieee80211_iterate_active_interfaces_atomic(ath12k_ar_to_hw(ar), 144 IEEE80211_IFACE_ITER_NORMAL, 145 ath12k_p2p_noa_update_vdev_iter, 146 &arg); 147 } 148