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/*
* Copyright (c) 2014-2016 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 "wil6210.h"
#include "wmi.h"
#define P2P_WILDCARD_SSID "DIRECT-"
#define P2P_DMG_SOCIAL_CHANNEL 2
#define P2P_SEARCH_DURATION_MS 500
#define P2P_DEFAULT_BI 100
bool wil_p2p_is_social_scan(struct cfg80211_scan_request *request)
{
return (request->n_channels == 1) &&
(request->channels[0]->hw_value == P2P_DMG_SOCIAL_CHANNEL);
}
void wil_p2p_discovery_timer_fn(ulong x)
{
struct wil6210_priv *wil = (void *)x;
wil_dbg_misc(wil, "%s\n", __func__);
schedule_work(&wil->p2p.discovery_expired_work);
}
int wil_p2p_search(struct wil6210_priv *wil,
struct cfg80211_scan_request *request)
{
int rc;
struct wil_p2p_info *p2p = &wil->p2p;
wil_dbg_misc(wil, "%s: channel %d\n",
__func__, P2P_DMG_SOCIAL_CHANNEL);
mutex_lock(&wil->mutex);
if (p2p->discovery_started) {
wil_err(wil, "%s: search failed. discovery already ongoing\n",
__func__);
rc = -EBUSY;
goto out;
}
rc = wmi_p2p_cfg(wil, P2P_DMG_SOCIAL_CHANNEL, P2P_DEFAULT_BI);
if (rc) {
wil_err(wil, "%s: wmi_p2p_cfg failed\n", __func__);
goto out;
}
rc = wmi_set_ssid(wil, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID);
if (rc) {
wil_err(wil, "%s: wmi_set_ssid failed\n", __func__);
goto out_stop;
}
/* Set application IE to probe request and probe response */
rc = wmi_set_ie(wil, WMI_FRAME_PROBE_REQ,
request->ie_len, request->ie);
if (rc) {
wil_err(wil, "%s: wmi_set_ie(WMI_FRAME_PROBE_REQ) failed\n",
__func__);
goto out_stop;
}
/* supplicant doesn't provide Probe Response IEs. As a workaround -
* re-use Probe Request IEs
*/
rc = wmi_set_ie(wil, WMI_FRAME_PROBE_RESP,
request->ie_len, request->ie);
if (rc) {
wil_err(wil, "%s: wmi_set_ie(WMI_FRAME_PROBE_RESP) failed\n",
__func__);
goto out_stop;
}
rc = wmi_start_search(wil);
if (rc) {
wil_err(wil, "%s: wmi_start_search failed\n", __func__);
goto out_stop;
}
p2p->discovery_started = 1;
INIT_WORK(&p2p->discovery_expired_work, wil_p2p_search_expired);
mod_timer(&p2p->discovery_timer,
jiffies + msecs_to_jiffies(P2P_SEARCH_DURATION_MS));
out_stop:
if (rc)
wmi_stop_discovery(wil);
out:
mutex_unlock(&wil->mutex);
return rc;
}
int wil_p2p_listen(struct wil6210_priv *wil, unsigned int duration,
struct ieee80211_channel *chan, u64 *cookie)
{
struct wil_p2p_info *p2p = &wil->p2p;
u8 channel = P2P_DMG_SOCIAL_CHANNEL;
int rc;
if (!chan)
return -EINVAL;
channel = chan->hw_value;
wil_dbg_misc(wil, "%s: duration %d\n", __func__, duration);
mutex_lock(&wil->mutex);
if (p2p->discovery_started) {
wil_err(wil, "%s: discovery already ongoing\n", __func__);
rc = -EBUSY;
goto out;
}
rc = wmi_p2p_cfg(wil, channel, P2P_DEFAULT_BI);
if (rc) {
wil_err(wil, "%s: wmi_p2p_cfg failed\n", __func__);
goto out;
}
rc = wmi_set_ssid(wil, strlen(P2P_WILDCARD_SSID), P2P_WILDCARD_SSID);
if (rc) {
wil_err(wil, "%s: wmi_set_ssid failed\n", __func__);
goto out_stop;
}
rc = wmi_start_listen(wil);
if (rc) {
wil_err(wil, "%s: wmi_start_listen failed\n", __func__);
goto out_stop;
}
memcpy(&p2p->listen_chan, chan, sizeof(*chan));
*cookie = ++p2p->cookie;
p2p->discovery_started = 1;
INIT_WORK(&p2p->discovery_expired_work, wil_p2p_listen_expired);
mod_timer(&p2p->discovery_timer,
jiffies + msecs_to_jiffies(duration));
out_stop:
if (rc)
wmi_stop_discovery(wil);
out:
mutex_unlock(&wil->mutex);
return rc;
}
u8 wil_p2p_stop_discovery(struct wil6210_priv *wil)
{
struct wil_p2p_info *p2p = &wil->p2p;
u8 started = p2p->discovery_started;
if (p2p->discovery_started) {
del_timer_sync(&p2p->discovery_timer);
p2p->discovery_started = 0;
wmi_stop_discovery(wil);
}
return started;
}
int wil_p2p_cancel_listen(struct wil6210_priv *wil, u64 cookie)
{
struct wil_p2p_info *p2p = &wil->p2p;
u8 started;
mutex_lock(&wil->mutex);
if (cookie != p2p->cookie) {
wil_info(wil, "%s: Cookie mismatch: 0x%016llx vs. 0x%016llx\n",
__func__, p2p->cookie, cookie);
mutex_unlock(&wil->mutex);
return -ENOENT;
}
started = wil_p2p_stop_discovery(wil);
mutex_unlock(&wil->mutex);
if (!started) {
wil_err(wil, "%s: listen not started\n", __func__);
return -ENOENT;
}
mutex_lock(&wil->p2p_wdev_mutex);
cfg80211_remain_on_channel_expired(wil->radio_wdev,
p2p->cookie,
&p2p->listen_chan,
GFP_KERNEL);
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
return 0;
}
void wil_p2p_listen_expired(struct work_struct *work)
{
struct wil_p2p_info *p2p = container_of(work,
struct wil_p2p_info, discovery_expired_work);
struct wil6210_priv *wil = container_of(p2p,
struct wil6210_priv, p2p);
u8 started;
wil_dbg_misc(wil, "%s()\n", __func__);
mutex_lock(&wil->mutex);
started = wil_p2p_stop_discovery(wil);
mutex_unlock(&wil->mutex);
if (started) {
mutex_lock(&wil->p2p_wdev_mutex);
cfg80211_remain_on_channel_expired(wil->radio_wdev,
p2p->cookie,
&p2p->listen_chan,
GFP_KERNEL);
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
}
}
void wil_p2p_search_expired(struct work_struct *work)
{
struct wil_p2p_info *p2p = container_of(work,
struct wil_p2p_info, discovery_expired_work);
struct wil6210_priv *wil = container_of(p2p,
struct wil6210_priv, p2p);
u8 started;
wil_dbg_misc(wil, "%s()\n", __func__);
mutex_lock(&wil->mutex);
started = wil_p2p_stop_discovery(wil);
mutex_unlock(&wil->mutex);
if (started) {
struct cfg80211_scan_info info = {
.aborted = false,
};
mutex_lock(&wil->p2p_wdev_mutex);
cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
}
}
void wil_p2p_stop_radio_operations(struct wil6210_priv *wil)
{
struct wil_p2p_info *p2p = &wil->p2p;
struct cfg80211_scan_info info = {
.aborted = true,
};
lockdep_assert_held(&wil->mutex);
mutex_lock(&wil->p2p_wdev_mutex);
if (wil->radio_wdev != wil->p2p_wdev)
goto out;
if (!p2p->discovery_started) {
/* Regular scan on the p2p device */
if (wil->scan_request &&
wil->scan_request->wdev == wil->p2p_wdev) {
cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
}
goto out;
}
/* Search or listen on p2p device */
mutex_unlock(&wil->p2p_wdev_mutex);
wil_p2p_stop_discovery(wil);
mutex_lock(&wil->p2p_wdev_mutex);
if (wil->scan_request) {
/* search */
cfg80211_scan_done(wil->scan_request, &info);
wil->scan_request = NULL;
} else {
/* listen */
cfg80211_remain_on_channel_expired(wil->radio_wdev,
p2p->cookie,
&p2p->listen_chan,
GFP_KERNEL);
}
out:
wil->radio_wdev = wil->wdev;
mutex_unlock(&wil->p2p_wdev_mutex);
}
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