1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. 4 */ 5 6 #include <net/mac80211.h> 7 #include "core.h" 8 #include "mac.h" 9 #include "p2p.h" 10 11 static void ath12k_p2p_noa_ie_fill(u8 *data, size_t len, 12 const struct ath12k_wmi_p2p_noa_info *noa) 13 { 14 struct ieee80211_p2p_noa_attr *noa_attr; 15 u8 ctwindow = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_CTWIN_TU); 16 bool oppps = le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS); 17 __le16 *noa_attr_len; 18 u16 attr_len; 19 u8 noa_descriptors = le32_get_bits(noa->noa_attr, 20 WMI_P2P_NOA_INFO_DESC_NUM); 21 int i; 22 23 /* P2P IE */ 24 data[0] = WLAN_EID_VENDOR_SPECIFIC; 25 data[1] = len - 2; 26 data[2] = (WLAN_OUI_WFA >> 16) & 0xff; 27 data[3] = (WLAN_OUI_WFA >> 8) & 0xff; 28 data[4] = (WLAN_OUI_WFA >> 0) & 0xff; 29 data[5] = WLAN_OUI_TYPE_WFA_P2P; 30 31 /* NOA ATTR */ 32 data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE; 33 noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */ 34 noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9]; 35 36 noa_attr->index = le32_get_bits(noa->noa_attr, 37 WMI_P2P_NOA_INFO_INDEX); 38 noa_attr->oppps_ctwindow = ctwindow; 39 if (oppps) 40 noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT; 41 42 for (i = 0; i < noa_descriptors; i++) { 43 noa_attr->desc[i].count = 44 __le32_to_cpu(noa->descriptors[i].type_count); 45 noa_attr->desc[i].duration = noa->descriptors[i].duration; 46 noa_attr->desc[i].interval = noa->descriptors[i].interval; 47 noa_attr->desc[i].start_time = noa->descriptors[i].start_time; 48 } 49 50 attr_len = 2; /* index + oppps_ctwindow */ 51 attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 52 *noa_attr_len = __cpu_to_le16(attr_len); 53 } 54 55 static size_t ath12k_p2p_noa_ie_len_compute(const struct ath12k_wmi_p2p_noa_info *noa) 56 { 57 size_t len = 0; 58 59 if (!(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM)) && 60 !(le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_OPP_PS))) 61 return 0; 62 63 len += 1 + 1 + 4; /* EID + len + OUI */ 64 len += 1 + 2; /* noa attr + attr len */ 65 len += 1 + 1; /* index + oppps_ctwindow */ 66 len += le32_get_bits(noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM) * 67 sizeof(struct ieee80211_p2p_noa_desc); 68 69 return len; 70 } 71 72 static void ath12k_p2p_noa_ie_assign(struct ath12k_vif *arvif, void *ie, 73 size_t len) 74 { 75 struct ath12k *ar = arvif->ar; 76 77 lockdep_assert_held(&ar->data_lock); 78 79 kfree(arvif->u.ap.noa_data); 80 81 arvif->u.ap.noa_data = ie; 82 arvif->u.ap.noa_len = len; 83 } 84 85 static void __ath12k_p2p_noa_update(struct ath12k_vif *arvif, 86 const struct ath12k_wmi_p2p_noa_info *noa) 87 { 88 struct ath12k *ar = arvif->ar; 89 void *ie; 90 size_t len; 91 92 lockdep_assert_held(&ar->data_lock); 93 94 ath12k_p2p_noa_ie_assign(arvif, NULL, 0); 95 96 len = ath12k_p2p_noa_ie_len_compute(noa); 97 if (!len) 98 return; 99 100 ie = kmalloc(len, GFP_ATOMIC); 101 if (!ie) 102 return; 103 104 ath12k_p2p_noa_ie_fill(ie, len, noa); 105 ath12k_p2p_noa_ie_assign(arvif, ie, len); 106 } 107 108 void ath12k_p2p_noa_update(struct ath12k_vif *arvif, 109 const struct ath12k_wmi_p2p_noa_info *noa) 110 { 111 struct ath12k *ar = arvif->ar; 112 113 spin_lock_bh(&ar->data_lock); 114 __ath12k_p2p_noa_update(arvif, noa); 115 spin_unlock_bh(&ar->data_lock); 116 } 117 118 static void ath12k_p2p_noa_update_vdev_iter(void *data, u8 *mac, 119 struct ieee80211_vif *vif) 120 { 121 struct ath12k_vif *arvif = ath12k_vif_to_arvif(vif); 122 struct ath12k_p2p_noa_arg *arg = data; 123 124 if (arvif->ar != arg->ar || arvif->vdev_id != arg->vdev_id) 125 return; 126 127 ath12k_p2p_noa_update(arvif, arg->noa); 128 } 129 130 void ath12k_p2p_noa_update_by_vdev_id(struct ath12k *ar, u32 vdev_id, 131 const struct ath12k_wmi_p2p_noa_info *noa) 132 { 133 struct ath12k_p2p_noa_arg arg = { 134 .vdev_id = vdev_id, 135 .ar = ar, 136 .noa = noa, 137 }; 138 139 ieee80211_iterate_active_interfaces_atomic(ath12k_ar_to_hw(ar), 140 IEEE80211_IFACE_ITER_NORMAL, 141 ath12k_p2p_noa_update_vdev_iter, 142 &arg); 143 } 144