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
ath10k_p2p_noa_ie_fill(u8 * data,size_t len,const struct wmi_p2p_noa_info * noa)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
ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info * noa)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
ath10k_p2p_noa_ie_assign(struct ath10k_vif * arvif,void * ie,size_t len)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
__ath10k_p2p_noa_update(struct ath10k_vif * arvif,const struct wmi_p2p_noa_info * noa)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
ath10k_p2p_noa_update(struct ath10k_vif * arvif,const struct wmi_p2p_noa_info * noa)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
ath10k_p2p_noa_update_vdev_iter(void * data,u8 * mac,struct ieee80211_vif * vif)132 static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
133 struct ieee80211_vif *vif)
134 {
135 struct ath10k_vif *arvif = (void *)vif->drv_priv;
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
ath10k_p2p_noa_update_by_vdev_id(struct ath10k * ar,u32 vdev_id,const struct wmi_p2p_noa_info * noa)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
