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
ath12k_p2p_noa_ie_fill(u8 * data,size_t len,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_ie_len_compute(const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_ie_assign(struct ath12k_link_vif * arvif,void * ie,size_t len)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
__ath12k_p2p_noa_update(struct ath12k_link_vif * arvif,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_update(struct ath12k_link_vif * arvif,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_update_vdev_iter(void * data,u8 * mac,struct ieee80211_vif * vif)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
ath12k_p2p_noa_update_by_vdev_id(struct ath12k * ar,u32 vdev_id,const struct ath12k_wmi_p2p_noa_info * noa)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