380 lines
8.7 KiB
C
380 lines
8.7 KiB
C
// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2014-2017 Qualcomm Atheros, Inc.
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* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*/
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#include "wil6210.h"
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#include "wmi.h"
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#define P2P_WILDCARD_SSID "DIRECT-"
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#define P2P_DMG_SOCIAL_CHANNEL 2
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#define P2P_SEARCH_DURATION_MS 500
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#define P2P_DEFAULT_BI 100
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static int wil_p2p_start_listen(struct wil6210_vif *vif)
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{
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struct wil6210_priv *wil = vif_to_wil(vif);
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struct wil_p2p_info *p2p = &vif->p2p;
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u8 channel = p2p->listen_chan.hw_value;
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int rc;
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lockdep_assert_held(&wil->mutex);
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rc = wmi_p2p_cfg(vif, channel, P2P_DEFAULT_BI);
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if (rc) {
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wil_err(wil, "wmi_p2p_cfg failed\n");
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goto out;
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}
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rc = wmi_set_ssid(vif, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID);
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if (rc) {
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wil_err(wil, "wmi_set_ssid failed\n");
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goto out_stop;
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}
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rc = wmi_start_listen(vif);
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if (rc) {
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wil_err(wil, "wmi_start_listen failed\n");
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goto out_stop;
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}
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INIT_WORK(&p2p->discovery_expired_work, wil_p2p_listen_expired);
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mod_timer(&p2p->discovery_timer,
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jiffies + msecs_to_jiffies(p2p->listen_duration));
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out_stop:
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if (rc)
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wmi_stop_discovery(vif);
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out:
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return rc;
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}
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bool wil_p2p_is_social_scan(struct cfg80211_scan_request *request)
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{
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return (request->n_channels == 1) &&
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(request->channels[0]->hw_value == P2P_DMG_SOCIAL_CHANNEL);
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}
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int wil_p2p_search(struct wil6210_vif *vif,
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struct cfg80211_scan_request *request)
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{
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struct wil6210_priv *wil = vif_to_wil(vif);
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int rc;
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struct wil_p2p_info *p2p = &vif->p2p;
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wil_dbg_misc(wil, "p2p_search: channel %d\n", P2P_DMG_SOCIAL_CHANNEL);
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lockdep_assert_held(&wil->mutex);
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if (p2p->discovery_started) {
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wil_err(wil, "search failed. discovery already ongoing\n");
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rc = -EBUSY;
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goto out;
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}
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rc = wmi_p2p_cfg(vif, P2P_DMG_SOCIAL_CHANNEL, P2P_DEFAULT_BI);
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if (rc) {
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wil_err(wil, "wmi_p2p_cfg failed\n");
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goto out;
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}
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rc = wmi_set_ssid(vif, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID);
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if (rc) {
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wil_err(wil, "wmi_set_ssid failed\n");
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goto out_stop;
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}
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/* Set application IE to probe request and probe response */
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rc = wmi_set_ie(vif, WMI_FRAME_PROBE_REQ,
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request->ie_len, request->ie);
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if (rc) {
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wil_err(wil, "wmi_set_ie(WMI_FRAME_PROBE_REQ) failed\n");
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goto out_stop;
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}
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/* supplicant doesn't provide Probe Response IEs. As a workaround -
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* re-use Probe Request IEs
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*/
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rc = wmi_set_ie(vif, WMI_FRAME_PROBE_RESP,
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request->ie_len, request->ie);
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if (rc) {
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wil_err(wil, "wmi_set_ie(WMI_FRAME_PROBE_RESP) failed\n");
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goto out_stop;
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}
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rc = wmi_start_search(vif);
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if (rc) {
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wil_err(wil, "wmi_start_search failed\n");
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goto out_stop;
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}
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p2p->discovery_started = 1;
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INIT_WORK(&p2p->discovery_expired_work, wil_p2p_search_expired);
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mod_timer(&p2p->discovery_timer,
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jiffies + msecs_to_jiffies(P2P_SEARCH_DURATION_MS));
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out_stop:
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if (rc)
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wmi_stop_discovery(vif);
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out:
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return rc;
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}
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int wil_p2p_listen(struct wil6210_priv *wil, struct wireless_dev *wdev,
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unsigned int duration, struct ieee80211_channel *chan,
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u64 *cookie)
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{
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struct wil6210_vif *vif = wdev_to_vif(wil, wdev);
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struct wil_p2p_info *p2p = &vif->p2p;
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int rc;
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if (!chan)
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return -EINVAL;
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wil_dbg_misc(wil, "p2p_listen: duration %d\n", duration);
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mutex_lock(&wil->mutex);
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if (p2p->discovery_started) {
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wil_err(wil, "discovery already ongoing\n");
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rc = -EBUSY;
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goto out;
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}
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memcpy(&p2p->listen_chan, chan, sizeof(*chan));
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*cookie = ++p2p->cookie;
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p2p->listen_duration = duration;
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mutex_lock(&wil->vif_mutex);
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if (vif->scan_request) {
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wil_dbg_misc(wil, "Delaying p2p listen until scan done\n");
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p2p->pending_listen_wdev = wdev;
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p2p->discovery_started = 1;
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rc = 0;
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mutex_unlock(&wil->vif_mutex);
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goto out;
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}
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mutex_unlock(&wil->vif_mutex);
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rc = wil_p2p_start_listen(vif);
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if (rc)
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goto out;
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p2p->discovery_started = 1;
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if (vif->mid == 0)
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wil->radio_wdev = wdev;
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cfg80211_ready_on_channel(wdev, *cookie, chan, duration,
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GFP_KERNEL);
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out:
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mutex_unlock(&wil->mutex);
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return rc;
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}
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u8 wil_p2p_stop_discovery(struct wil6210_vif *vif)
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{
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struct wil_p2p_info *p2p = &vif->p2p;
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u8 started = p2p->discovery_started;
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if (p2p->discovery_started) {
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if (p2p->pending_listen_wdev) {
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/* discovery not really started, only pending */
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p2p->pending_listen_wdev = NULL;
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} else {
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del_timer_sync(&p2p->discovery_timer);
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wmi_stop_discovery(vif);
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}
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p2p->discovery_started = 0;
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}
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return started;
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}
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int wil_p2p_cancel_listen(struct wil6210_vif *vif, u64 cookie)
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{
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struct wil6210_priv *wil = vif_to_wil(vif);
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struct wil_p2p_info *p2p = &vif->p2p;
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u8 started;
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mutex_lock(&wil->mutex);
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if (cookie != p2p->cookie) {
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wil_info(wil, "Cookie mismatch: 0x%016llx vs. 0x%016llx\n",
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p2p->cookie, cookie);
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mutex_unlock(&wil->mutex);
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return -ENOENT;
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}
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started = wil_p2p_stop_discovery(vif);
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mutex_unlock(&wil->mutex);
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if (!started) {
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wil_err(wil, "listen not started\n");
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return -ENOENT;
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}
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mutex_lock(&wil->vif_mutex);
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cfg80211_remain_on_channel_expired(vif_to_radio_wdev(wil, vif),
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p2p->cookie,
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&p2p->listen_chan,
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GFP_KERNEL);
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if (vif->mid == 0)
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wil->radio_wdev = wil->main_ndev->ieee80211_ptr;
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mutex_unlock(&wil->vif_mutex);
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return 0;
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}
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void wil_p2p_listen_expired(struct work_struct *work)
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{
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struct wil_p2p_info *p2p = container_of(work,
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struct wil_p2p_info, discovery_expired_work);
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struct wil6210_vif *vif = container_of(p2p,
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struct wil6210_vif, p2p);
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struct wil6210_priv *wil = vif_to_wil(vif);
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u8 started;
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wil_dbg_misc(wil, "p2p_listen_expired\n");
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mutex_lock(&wil->mutex);
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started = wil_p2p_stop_discovery(vif);
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mutex_unlock(&wil->mutex);
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if (!started)
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return;
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mutex_lock(&wil->vif_mutex);
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cfg80211_remain_on_channel_expired(vif_to_radio_wdev(wil, vif),
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p2p->cookie,
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&p2p->listen_chan,
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GFP_KERNEL);
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if (vif->mid == 0)
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wil->radio_wdev = wil->main_ndev->ieee80211_ptr;
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mutex_unlock(&wil->vif_mutex);
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}
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void wil_p2p_search_expired(struct work_struct *work)
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{
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struct wil_p2p_info *p2p = container_of(work,
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struct wil_p2p_info, discovery_expired_work);
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struct wil6210_vif *vif = container_of(p2p,
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struct wil6210_vif, p2p);
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struct wil6210_priv *wil = vif_to_wil(vif);
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u8 started;
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wil_dbg_misc(wil, "p2p_search_expired\n");
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mutex_lock(&wil->mutex);
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started = wil_p2p_stop_discovery(vif);
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mutex_unlock(&wil->mutex);
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if (started) {
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struct cfg80211_scan_info info = {
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.aborted = false,
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};
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mutex_lock(&wil->vif_mutex);
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if (vif->scan_request) {
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cfg80211_scan_done(vif->scan_request, &info);
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vif->scan_request = NULL;
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if (vif->mid == 0)
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wil->radio_wdev =
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wil->main_ndev->ieee80211_ptr;
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}
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mutex_unlock(&wil->vif_mutex);
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}
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}
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void wil_p2p_delayed_listen_work(struct work_struct *work)
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{
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struct wil_p2p_info *p2p = container_of(work,
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struct wil_p2p_info, delayed_listen_work);
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struct wil6210_vif *vif = container_of(p2p,
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struct wil6210_vif, p2p);
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struct wil6210_priv *wil = vif_to_wil(vif);
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int rc;
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mutex_lock(&wil->mutex);
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wil_dbg_misc(wil, "Checking delayed p2p listen\n");
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if (!p2p->discovery_started || !p2p->pending_listen_wdev)
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goto out;
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mutex_lock(&wil->vif_mutex);
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if (vif->scan_request) {
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/* another scan started, wait again... */
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mutex_unlock(&wil->vif_mutex);
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goto out;
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}
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mutex_unlock(&wil->vif_mutex);
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rc = wil_p2p_start_listen(vif);
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mutex_lock(&wil->vif_mutex);
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if (rc) {
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cfg80211_remain_on_channel_expired(p2p->pending_listen_wdev,
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p2p->cookie,
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&p2p->listen_chan,
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GFP_KERNEL);
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if (vif->mid == 0)
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wil->radio_wdev = wil->main_ndev->ieee80211_ptr;
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} else {
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cfg80211_ready_on_channel(p2p->pending_listen_wdev, p2p->cookie,
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&p2p->listen_chan,
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p2p->listen_duration, GFP_KERNEL);
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if (vif->mid == 0)
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wil->radio_wdev = p2p->pending_listen_wdev;
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}
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p2p->pending_listen_wdev = NULL;
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mutex_unlock(&wil->vif_mutex);
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out:
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mutex_unlock(&wil->mutex);
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}
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void wil_p2p_stop_radio_operations(struct wil6210_priv *wil)
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{
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struct wil6210_vif *vif = ndev_to_vif(wil->main_ndev);
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struct wil_p2p_info *p2p = &vif->p2p;
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struct cfg80211_scan_info info = {
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.aborted = true,
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};
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lockdep_assert_held(&wil->mutex);
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lockdep_assert_held(&wil->vif_mutex);
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if (wil->radio_wdev != wil->p2p_wdev)
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goto out;
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if (!p2p->discovery_started) {
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/* Regular scan on the p2p device */
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if (vif->scan_request &&
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vif->scan_request->wdev == wil->p2p_wdev)
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wil_abort_scan(vif, true);
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goto out;
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}
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/* Search or listen on p2p device */
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mutex_unlock(&wil->vif_mutex);
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wil_p2p_stop_discovery(vif);
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mutex_lock(&wil->vif_mutex);
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if (vif->scan_request) {
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/* search */
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cfg80211_scan_done(vif->scan_request, &info);
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vif->scan_request = NULL;
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} else {
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/* listen */
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cfg80211_remain_on_channel_expired(wil->radio_wdev,
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p2p->cookie,
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&p2p->listen_chan,
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GFP_KERNEL);
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}
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out:
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wil->radio_wdev = wil->main_ndev->ieee80211_ptr;
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}
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