1 // SPDX-License-Identifier: GPL-2.0-only
3 * Scan related functions.
5 * Copyright (c) 2017-2020, Silicon Laboratories, Inc.
6 * Copyright (c) 2010, ST-Ericsson
8 #include <net/mac80211.h>
13 #include "hif_tx_mib.h"
15 static void __ieee80211_scan_completed_compat(struct ieee80211_hw *hw,
18 struct cfg80211_scan_info info = {
22 ieee80211_scan_completed(hw, &info);
25 static int update_probe_tmpl(struct wfx_vif *wvif,
26 struct cfg80211_scan_request *req)
30 skb = ieee80211_probereq_get(wvif->wdev->hw, wvif->vif->addr,
31 NULL, 0, req->ie_len);
35 skb_put_data(skb, req->ie, req->ie_len);
36 hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBREQ, 0);
41 static int send_scan_req(struct wfx_vif *wvif,
42 struct cfg80211_scan_request *req, int start_idx)
45 struct ieee80211_channel *ch_start, *ch_cur;
47 for (i = start_idx; i < req->n_channels; i++) {
48 ch_start = req->channels[start_idx];
49 ch_cur = req->channels[i];
50 WARN(ch_cur->band != NL80211_BAND_2GHZ, "band not supported");
51 if (ch_cur->max_power != ch_start->max_power)
53 if ((ch_cur->flags ^ ch_start->flags) & IEEE80211_CHAN_NO_IR)
56 wfx_tx_lock_flush(wvif->wdev);
57 wvif->scan_abort = false;
58 reinit_completion(&wvif->scan_complete);
59 ret = hif_scan(wvif, req, start_idx, i - start_idx, &timeout);
61 wfx_tx_unlock(wvif->wdev);
64 ret = wait_for_completion_timeout(&wvif->scan_complete, timeout);
65 if (req->channels[start_idx]->max_power != wvif->vif->bss_conf.txpower)
66 hif_set_output_power(wvif, wvif->vif->bss_conf.txpower);
67 wfx_tx_unlock(wvif->wdev);
69 dev_notice(wvif->wdev->dev, "scan timeout\n");
73 if (wvif->scan_abort) {
74 dev_notice(wvif->wdev->dev, "scan abort\n");
81 * It is not really necessary to run scan request asynchronously. However,
82 * there is a bug in "iw scan" when ieee80211_scan_completed() is called before
83 * wfx_hw_scan() return
85 void wfx_hw_scan_work(struct work_struct *work)
87 struct wfx_vif *wvif = container_of(work, struct wfx_vif, scan_work);
88 struct ieee80211_scan_request *hw_req = wvif->scan_req;
91 mutex_lock(&wvif->wdev->conf_mutex);
92 mutex_lock(&wvif->scan_lock);
93 if (wvif->join_in_progress) {
94 dev_info(wvif->wdev->dev, "%s: abort in-progress REQ_JOIN",
98 update_probe_tmpl(wvif, &hw_req->req);
101 ret = send_scan_req(wvif, &hw_req->req, chan_cur);
104 } while (ret > 0 && chan_cur < hw_req->req.n_channels);
105 mutex_unlock(&wvif->scan_lock);
106 mutex_unlock(&wvif->wdev->conf_mutex);
107 __ieee80211_scan_completed_compat(wvif->wdev->hw, ret < 0);
110 int wfx_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
111 struct ieee80211_scan_request *hw_req)
113 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
115 WARN_ON(hw_req->req.n_channels > HIF_API_MAX_NB_CHANNELS);
116 wvif->scan_req = hw_req;
117 schedule_work(&wvif->scan_work);
121 void wfx_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
123 struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
125 wvif->scan_abort = true;
129 void wfx_scan_complete(struct wfx_vif *wvif)
131 complete(&wvif->scan_complete);