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path: root/drivers/net/wireless/ath/wil6210/p2p.c
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Diffstat (limited to 'drivers/net/wireless/ath/wil6210/p2p.c')
-rw-r--r--drivers/net/wireless/ath/wil6210/p2p.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/p2p.c b/drivers/net/wireless/ath/wil6210/p2p.c
new file mode 100644
index 000000000000..2c1b8958180e
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/p2p.c
@@ -0,0 +1,253 @@
+/*
+ * 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
+
+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)
+ 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) {
+ mutex_lock(&wil->p2p_wdev_mutex);
+ cfg80211_scan_done(wil->scan_request, 0);
+ wil->scan_request = NULL;
+ wil->radio_wdev = wil->wdev;
+ mutex_unlock(&wil->p2p_wdev_mutex);
+ }
+}
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