summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath10k/p2p.c
blob: 7e621ee194e3d717706a3186afec2cee2b0ad5d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
/*
 * Copyright (c) 2015 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "core.h"
#include "wmi.h"
#include "mac.h"
#include "p2p.h"

static void ath10k_p2p_noa_ie_fill(u8 *data, size_t len,
				   const struct wmi_p2p_noa_info *noa)
{
	struct ieee80211_p2p_noa_attr *noa_attr;
	u8  ctwindow_oppps = noa->ctwindow_oppps;
	u8 ctwindow = ctwindow_oppps >> WMI_P2P_OPPPS_CTWINDOW_OFFSET;
	bool oppps = !!(ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT);
	__le16 *noa_attr_len;
	u16 attr_len;
	u8 noa_descriptors = noa->num_descriptors;
	int i;

	/* P2P IE */
	data[0] = WLAN_EID_VENDOR_SPECIFIC;
	data[1] = len - 2;
	data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
	data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
	data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
	data[5] = WLAN_OUI_TYPE_WFA_P2P;

	/* NOA ATTR */
	data[6] = IEEE80211_P2P_ATTR_ABSENCE_NOTICE;
	noa_attr_len = (__le16 *)&data[7]; /* 2 bytes */
	noa_attr = (struct ieee80211_p2p_noa_attr *)&data[9];

	noa_attr->index = noa->index;
	noa_attr->oppps_ctwindow = ctwindow;
	if (oppps)
		noa_attr->oppps_ctwindow |= IEEE80211_P2P_OPPPS_ENABLE_BIT;

	for (i = 0; i < noa_descriptors; i++) {
		noa_attr->desc[i].count =
			__le32_to_cpu(noa->descriptors[i].type_count);
		noa_attr->desc[i].duration = noa->descriptors[i].duration;
		noa_attr->desc[i].interval = noa->descriptors[i].interval;
		noa_attr->desc[i].start_time = noa->descriptors[i].start_time;
	}

	attr_len = 2; /* index + oppps_ctwindow */
	attr_len += noa_descriptors * sizeof(struct ieee80211_p2p_noa_desc);
	*noa_attr_len = __cpu_to_le16(attr_len);
}

static size_t ath10k_p2p_noa_ie_len_compute(const struct wmi_p2p_noa_info *noa)
{
	size_t len = 0;

	if (!noa->num_descriptors &&
	    !(noa->ctwindow_oppps & WMI_P2P_OPPPS_ENABLE_BIT))
		return 0;

	len += 1 + 1 + 4; /* EID + len + OUI */
	len += 1 + 2; /* noa attr + attr len */
	len += 1 + 1; /* index + oppps_ctwindow */
	len += noa->num_descriptors * sizeof(struct ieee80211_p2p_noa_desc);

	return len;
}

static void ath10k_p2p_noa_ie_assign(struct ath10k_vif *arvif, void *ie,
				     size_t len)
{
	struct ath10k *ar = arvif->ar;

	lockdep_assert_held(&ar->data_lock);

	kfree(arvif->u.ap.noa_data);

	arvif->u.ap.noa_data = ie;
	arvif->u.ap.noa_len = len;
}

static void __ath10k_p2p_noa_update(struct ath10k_vif *arvif,
				    const struct wmi_p2p_noa_info *noa)
{
	struct ath10k *ar = arvif->ar;
	void *ie;
	size_t len;

	lockdep_assert_held(&ar->data_lock);

	ath10k_p2p_noa_ie_assign(arvif, NULL, 0);

	len = ath10k_p2p_noa_ie_len_compute(noa);
	if (!len)
		return;

	ie = kmalloc(len, GFP_ATOMIC);
	if (!ie)
		return;

	ath10k_p2p_noa_ie_fill(ie, len, noa);
	ath10k_p2p_noa_ie_assign(arvif, ie, len);
}

void ath10k_p2p_noa_update(struct ath10k_vif *arvif,
			   const struct wmi_p2p_noa_info *noa)
{
	struct ath10k *ar = arvif->ar;

	spin_lock_bh(&ar->data_lock);
	__ath10k_p2p_noa_update(arvif, noa);
	spin_unlock_bh(&ar->data_lock);
}

struct ath10k_p2p_noa_arg {
	u32 vdev_id;
	const struct wmi_p2p_noa_info *noa;
};

static void ath10k_p2p_noa_update_vdev_iter(void *data, u8 *mac,
					    struct ieee80211_vif *vif)
{
	struct ath10k_vif *arvif = (void *)vif->drv_priv;
	struct ath10k_p2p_noa_arg *arg = data;

	if (arvif->vdev_id != arg->vdev_id)
		return;

	ath10k_p2p_noa_update(arvif, arg->noa);
}

void ath10k_p2p_noa_update_by_vdev_id(struct ath10k *ar, u32 vdev_id,
				      const struct wmi_p2p_noa_info *noa)
{
	struct ath10k_p2p_noa_arg arg = {
		.vdev_id = vdev_id,
		.noa = noa,
	};

	ieee80211_iterate_active_interfaces_atomic(ar->hw,
						   IEEE80211_IFACE_ITER_NORMAL,
						   ath10k_p2p_noa_update_vdev_iter,
						   &arg);
}