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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// SPDX-License-Identifier: ISC
/*
* Copyright (C) 2024 Felix Fietkau <nbd@nbd.name>
*/
#include "mt76.h"
static void mt76_scan_complete(struct mt76_dev *dev, bool abort)
{
struct mt76_phy *phy = dev->scan.phy;
struct cfg80211_scan_info info = {
.aborted = abort,
};
if (!phy)
return;
clear_bit(MT76_SCANNING, &phy->state);
if (dev->scan.chan && phy->main_chandef.chan)
mt76_set_channel(phy, &phy->main_chandef, false);
mt76_put_vif_phy_link(phy, dev->scan.vif, dev->scan.mlink);
memset(&dev->scan, 0, sizeof(dev->scan));
ieee80211_scan_completed(phy->hw, &info);
}
void mt76_abort_scan(struct mt76_dev *dev)
{
cancel_delayed_work_sync(&dev->scan_work);
mt76_scan_complete(dev, true);
}
static void
mt76_scan_send_probe(struct mt76_dev *dev, struct cfg80211_ssid *ssid)
{
struct cfg80211_scan_request *req = dev->scan.req;
struct ieee80211_vif *vif = dev->scan.vif;
struct mt76_vif_link *mvif = dev->scan.mlink;
enum nl80211_band band = dev->scan.chan->band;
struct mt76_phy *phy = dev->scan.phy;
struct ieee80211_tx_info *info;
struct sk_buff *skb;
skb = ieee80211_probereq_get(phy->hw, vif->addr, ssid->ssid,
ssid->ssid_len, req->ie_len);
if (!skb)
return;
if (is_unicast_ether_addr(req->bssid)) {
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
ether_addr_copy(hdr->addr1, req->bssid);
ether_addr_copy(hdr->addr3, req->bssid);
}
if (req->ie_len)
skb_put_data(skb, req->ie, req->ie_len);
skb->priority = 7;
skb_set_queue_mapping(skb, IEEE80211_AC_VO);
rcu_read_lock();
if (!ieee80211_tx_prepare_skb(phy->hw, vif, skb, band, NULL)) {
ieee80211_free_txskb(phy->hw, skb);
goto out;
}
info = IEEE80211_SKB_CB(skb);
if (req->no_cck)
info->flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
info->control.flags |= IEEE80211_TX_CTRL_DONT_USE_RATE_MASK;
mt76_tx(phy, NULL, mvif->wcid, skb);
out:
rcu_read_unlock();
}
void mt76_scan_work(struct work_struct *work)
{
struct mt76_dev *dev = container_of(work, struct mt76_dev,
scan_work.work);
struct cfg80211_scan_request *req = dev->scan.req;
struct cfg80211_chan_def chandef = {};
struct mt76_phy *phy = dev->scan.phy;
int duration = HZ / 9; /* ~110 ms */
int i;
if (dev->scan.chan_idx >= req->n_channels) {
mt76_scan_complete(dev, false);
return;
}
if (dev->scan.chan && phy->num_sta) {
dev->scan.chan = NULL;
mt76_set_channel(phy, &phy->main_chandef, false);
goto out;
}
dev->scan.chan = req->channels[dev->scan.chan_idx++];
cfg80211_chandef_create(&chandef, dev->scan.chan, NL80211_CHAN_HT20);
mt76_set_channel(phy, &chandef, true);
if (!req->n_ssids ||
chandef.chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR))
goto out;
duration = HZ / 16; /* ~60 ms */
local_bh_disable();
for (i = 0; i < req->n_ssids; i++)
mt76_scan_send_probe(dev, &req->ssids[i]);
local_bh_enable();
out:
if (!duration)
return;
if (dev->scan.chan)
duration = max_t(int, duration,
msecs_to_jiffies(req->duration +
(req->duration >> 5)));
ieee80211_queue_delayed_work(dev->phy.hw, &dev->scan_work, duration);
}
int mt76_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_scan_request *req)
{
struct mt76_phy *phy = hw->priv;
struct mt76_dev *dev = phy->dev;
struct mt76_vif_link *mlink;
int ret = 0;
if (hw->wiphy->n_radio > 1) {
phy = dev->band_phys[req->req.channels[0]->band];
if (!phy)
return -EINVAL;
}
mutex_lock(&dev->mutex);
if (dev->scan.req || phy->roc_vif) {
ret = -EBUSY;
goto out;
}
mlink = mt76_get_vif_phy_link(phy, vif);
if (IS_ERR(mlink)) {
ret = PTR_ERR(mlink);
goto out;
}
memset(&dev->scan, 0, sizeof(dev->scan));
dev->scan.req = &req->req;
dev->scan.vif = vif;
dev->scan.phy = phy;
dev->scan.mlink = mlink;
ieee80211_queue_delayed_work(dev->phy.hw, &dev->scan_work, 0);
out:
mutex_unlock(&dev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(mt76_hw_scan);
void mt76_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
struct mt76_phy *phy = hw->priv;
mt76_abort_scan(phy->dev);
}
EXPORT_SYMBOL_GPL(mt76_cancel_hw_scan);
|
