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
ath12k_p2p_noa_ie_fill(u8 * data,size_t len,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_ie_len_compute(const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_ie_assign(struct ath12k_vif * arvif,void * ie,size_t len)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
__ath12k_p2p_noa_update(struct ath12k_vif * arvif,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_update(struct ath12k_vif * arvif,const struct ath12k_wmi_p2p_noa_info * noa)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
ath12k_p2p_noa_update_vdev_iter(void * data,u8 * mac,struct ieee80211_vif * vif)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
ath12k_p2p_noa_update_by_vdev_id(struct ath12k * ar,u32 vdev_id,const struct ath12k_wmi_p2p_noa_info * noa)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