1 /* 2 * Copyright (c) 2015 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "core.h" 18 #include "wmi.h" 19 #include "mac.h" 20 #include "p2p.h" 21 22 static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len, 23 const struct wmi_p2p_noa_info *noa) 24 { 25 struct ieee80211_p2p_noa_attr *noa_attr; 26 u8 ctwindow_oppps = noa->ctwindow_oppps; 27 u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET; 28 bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT); 29 __le16 *noa_attr_len; 30 u16 attr_len; 31 u8 noa_descriptors = noa->num_descriptors; 32 int i; 33 34 /* P2P IE */ 35 data[0] = WLAN_EID_VENDOR_SPECIFIC; 36 data[1] = len - 2; 37 data[2] = (WLAN_OUI_WFA >> 16) & 0xff; 38 data[3] = (WLAN_OUI_WFA >> 8) & 0xff; 39 data[4] = (WLAN_OUI_WFA >> 0) & 0xff; 40 data[5] = WLAN_OUI_TYPE_WFA_P2P; 41 42 /* NOA ATTR */ 43 data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE; 44 noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */ 45 noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9]; 46 47 noa_attr->index = noa->index; 48 noa_attr->oppps_ctwindow = ctwindow; 49 if (oppps) 50 noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT; 51 52 for (i = 0; i < noa_descriptors; i++) { 53 noa_attr->desc[i].count = 54 __le32_to_cpu(noa->descriptors[i].type_count); 55 noa_attr->desc[i].duration = noa->descriptors[i].duration; 56 noa_attr->desc[i].interval = noa->descriptors[i].interval; 57 noa_attr->desc[i].start_time = noa->descriptors[i].start_time; 58 } 59 60 attr_len = 2; /* index + oppps_ctwindow */ 61 attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 62 *noa_attr_len = __cpu_to_le16(attr_len); 63 } 64 65 static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa) 66 { 67 size_t len = 0; 68 69 if (!noa->num_descriptors && 70 !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT)) 71 return 0; 72 73 len += 1 + 1 + 4; /* EID + len + OUI */ 74 len += 1 + 2; /* noa attr + attr len */ 75 len += 1 + 1; /* index + oppps_ctwindow */ 76 len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc); 77 78 return len; 79 } 80 81 static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie, 82 size_t len) 83 { 84 struct ath10k *ar = arvif->ar; 85 86 lockdep_assert_held(&ar->data_lock); 87 88 kfree(arvif->u.ap.noa_data); 89 90 arvif->u.ap.noa_data = ie; 91 arvif->u.ap.noa_len = len; 92 } 93 94 static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif, 95 const struct wmi_p2p_noa_info *noa) 96 { 97 struct ath10k *ar = arvif->ar; 98 void *ie; 99 size_t len; 100 101 lockdep_assert_held(&ar->data_lock); 102 103 ath10k_p2p_noa_ie_assign(arvif, NULL, 0); 104 105 len = ath10k_p2p_noa_ie_len_compute(noa); 106 if (!len) 107 return; 108 109 ie = kmalloc(len, GFP_ATOMIC); 110 if (!ie) 111 return; 112 113 ath10k_p2p_noa_ie_fill(ie, len, noa); 114 ath10k_p2p_noa_ie_assign(arvif, ie, len); 115 } 116 117 void ath10k_p2p_noa_update(struct ath10k_vif *arvif, 118 const struct wmi_p2p_noa_info *noa) 119 { 120 struct ath10k *ar = arvif->ar; 121 122 spin_lock_bh(&ar->data_lock); 123 __ath10k_p2p_noa_update(arvif, noa); 124 spin_unlock_bh(&ar->data_lock); 125 } 126 127 struct ath10k_p2p_noa_arg { 128 u32 vdev_id; 129 const struct wmi_p2p_noa_info *noa; 130 }; 131 132 static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac, 133 struct ieee80211_vif *vif) 134 { 135 struct ath10k_vif *arvif = ath10k_vif_to_arvif(vif); 136 struct ath10k_p2p_noa_arg *arg = data; 137 138 if (arvif->vdev_id != arg->vdev_id) 139 return; 140 141 ath10k_p2p_noa_update(arvif, arg->noa); 142 } 143 144 void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id, 145 const struct wmi_p2p_noa_info *noa) 146 { 147 struct ath10k_p2p_noa_arg arg = { 148 .vdev_id = vdev_id, 149 .noa = noa, 150 }; 151 152 ieee80211_iterate_active_interfaces_atomic(ar->hw, 153 IEEE80211_IFACE_ITER_NORMAL, 154 ath10k_p2p_noa_update_vdev_iter, 155 &arg); 156 } 157