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(v: noa->noa_attr, WMI_P2P_NOA_INFO_CTWIN_TU); |
16 | bool oppps = le32_get_bits(v: 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(v: 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(v: 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(v: noa->noa_attr, WMI_P2P_NOA_INFO_DESC_NUM)) && |
60 | !(le32_get_bits(v: 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(v: 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(objp: 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, len: 0); |
95 | |
96 | len = ath12k_p2p_noa_ie_len_compute(noa); |
97 | if (!len) |
98 | return; |
99 | |
100 | ie = kmalloc(size: len, GFP_ATOMIC); |
101 | if (!ie) |
102 | return; |
103 | |
104 | ath12k_p2p_noa_ie_fill(data: 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(lock: &ar->data_lock); |
114 | __ath12k_p2p_noa_update(arvif, noa); |
115 | spin_unlock_bh(lock: &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->vdev_id != arg->vdev_id) |
125 | return; |
126 | |
127 | ath12k_p2p_noa_update(arvif, noa: 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 | .noa = noa, |
136 | }; |
137 | |
138 | ieee80211_iterate_active_interfaces_atomic(hw: ath12k_ar_to_hw(ar), |
139 | iter_flags: IEEE80211_IFACE_ITER_NORMAL, |
140 | iterator: ath12k_p2p_noa_update_vdev_iter, |
141 | data: &arg); |
142 | } |
143 | |