1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (c) 2015 Qualcomm Atheros, Inc. 4 */ 5 6 #include "core.h" 7 #include "wmi.h" 8 #include "mac.h" 9 #include "p2p.h" 10 11 static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len, 12 const struct wmi_p2p_noa_info *noa) 13 { 14 struct ieee80211_p2p_noa_attr *noa_attr; 15 u8 ctwindow_oppps = noa->ctwindow_oppps; 16 u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET; 17 bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT); 18 __le16 *noa_attr_len; 19 u16 attr_len; 20 u8 noa_descriptors = noa->num_descriptors; 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 = noa->index; 37 noa_attr->oppps_ctwindow = ctwindow; 38 if (oppps) 39 noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT; 40 41 for (i = 0; i < noa_descriptors; i++) { 42 noa_attr->desc[i].count = 43 __le32_to_cpu(noa->descriptors[i].type_count); 44 noa_attr->desc[i].duration = noa->descriptors[i].duration; 45 noa_attr->desc[i].interval = noa->descriptors[i].interval; 46 noa_attr->desc[i].start_time = noa->descriptors[i].start_time; 47 } 48 49 attr_len = 2; /* index + oppps_ctwindow */ 50 attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 51 *noa_attr_len = __cpu_to_le16(attr_len); 52 } 53 54 static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa) 55 { 56 size_t len = 0; 57 58 if (!noa->num_descriptors && 59 !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT)) 60 return 0; 61 62 len += 1 + 1 + 4; /* EID + len + OUI */ 63 len += 1 + 2; /* noa attr + attr len */ 64 len += 1 + 1; /* index + oppps_ctwindow */ 65 len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 66 67 return len; 68 } 69 70 static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie, 71 size_t len) 72 { 73 struct ath10k *ar = arvif->ar; 74 75 lockdep_assert_held(&ar->data_lock); 76 77 kfree(arvif->u.ap.noa_data); 78 79 arvif->u.ap.noa_data = ie; 80 arvif->u.ap.noa_len = len; 81 } 82 83 static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif, 84 const struct wmi_p2p_noa_info *noa) 85 { 86 struct ath10k *ar = arvif->ar; 87 void *ie; 88 size_t len; 89 90 lockdep_assert_held(&ar->data_lock); 91 92 ath10k_p2p_noa_ie_assign(arvif, NULL, 0); 93 94 len = ath10k_p2p_noa_ie_len_compute(noa); 95 if (!len) 96 return; 97 98 ie = kmalloc(len, GFP_ATOMIC); 99 if (!ie) 100 return; 101 102 ath10k_p2p_noa_ie_fill(ie, len, noa); 103 ath10k_p2p_noa_ie_assign(arvif, ie, len); 104 } 105 106 void ath10k_p2p_noa_update(struct ath10k_vif *arvif, 107 const struct wmi_p2p_noa_info *noa) 108 { 109 struct ath10k *ar = arvif->ar; 110 111 spin_lock_bh(&ar->data_lock); 112 __ath10k_p2p_noa_update(arvif, noa); 113 spin_unlock_bh(&ar->data_lock); 114 } 115 116 struct ath10k_p2p_noa_arg { 117 u32 vdev_id; 118 const struct wmi_p2p_noa_info *noa; 119 }; 120 121 static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac, 122 struct ieee80211_vif *vif) 123 { 124 struct ath10k_vif *arvif = (void *)vif->drv_priv; 125 struct ath10k_p2p_noa_arg *arg = data; 126 127 if (arvif->vdev_id != arg->vdev_id) 128 return; 129 130 ath10k_p2p_noa_update(arvif, arg->noa); 131 } 132 133 void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id, 134 const struct wmi_p2p_noa_info *noa) 135 { 136 struct ath10k_p2p_noa_arg arg = { 137 .vdev_id = vdev_id, 138 .noa = noa, 139 }; 140 141 ieee80211_iterate_active_interfaces_atomic(ar->hw, 142 IEEE80211_IFACE_ITER_NORMAL, 143 ath10k_p2p_noa_update_vdev_iter, 144 &arg); 145 } 146