ath6kl: implement scheduled scan
ath6kl firmware supports scheduled scan functionality with the wow ssid
filter. But the firmware does not send any events after scan results
so I had to add a timer which notifies about new scan results.
Sched scan needs firmware version 3.2.0.6 or later. If firmware doesn't
support sched scan the driver will not enable the feature.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 074e2aa..48d414a 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -123,6 +123,37 @@
#define CCKM_KRK_CIPHER_SUITE 0x004096ff /* use for KRK */
+/* returns true if scheduled scan was stopped */
+static bool __ath6kl_cfg80211_sscan_stop(struct ath6kl_vif *vif)
+{
+ struct ath6kl *ar = vif->ar;
+
+ if (ar->state != ATH6KL_STATE_SCHED_SCAN)
+ return false;
+
+ del_timer_sync(&vif->sched_scan_timer);
+
+ ath6kl_wmi_set_host_sleep_mode_cmd(ar->wmi, vif->fw_vif_idx,
+ ATH6KL_HOST_MODE_AWAKE);
+
+ ar->state = ATH6KL_STATE_ON;
+
+ return true;
+}
+
+static void ath6kl_cfg80211_sscan_disable(struct ath6kl_vif *vif)
+{
+ struct ath6kl *ar = vif->ar;
+ bool stopped;
+
+ stopped = __ath6kl_cfg80211_sscan_stop(vif);
+
+ if (!stopped)
+ return;
+
+ cfg80211_sched_scan_stopped(ar->wiphy);
+}
+
static int ath6kl_set_wpa_version(struct ath6kl_vif *vif,
enum nl80211_wpa_versions wpa_version)
{
@@ -383,6 +414,8 @@
struct ath6kl_vif *vif = netdev_priv(dev);
int status;
+ ath6kl_cfg80211_sscan_disable(vif);
+
vif->sme_state = SME_CONNECTING;
if (!ath6kl_cfg80211_ready(vif))
@@ -710,6 +743,8 @@
ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "%s: reason=%u\n", __func__,
reason_code);
+ ath6kl_cfg80211_sscan_disable(vif);
+
if (!ath6kl_cfg80211_ready(vif))
return -EIO;
@@ -812,6 +847,8 @@
if (!ath6kl_cfg80211_ready(vif))
return -EIO;
+ ath6kl_cfg80211_sscan_disable(vif);
+
if (!ar->usr_bss_filter) {
clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
ret = ath6kl_wmi_bssfilter_cmd(
@@ -837,6 +874,10 @@
request->ssids[i].ssid);
}
+ /*
+ * FIXME: we should clear the IE in fw if it's not set so just
+ * remove the check altogether
+ */
if (request->ie) {
ret = ath6kl_wmi_set_appie_cmd(ar->wmi, vif->fw_vif_idx,
WMI_FRAME_PROBE_REQ,
@@ -1835,6 +1876,13 @@
break;
+ case ATH6KL_CFG_SUSPEND_SCHED_SCAN:
+ /*
+ * Nothing needed for schedule scan, firmware is already in
+ * wow mode and sleeping most of the time.
+ */
+ break;
+
default:
break;
}
@@ -1883,6 +1931,9 @@
}
break;
+ case ATH6KL_STATE_SCHED_SCAN:
+ break;
+
default:
break;
}
@@ -2329,6 +2380,90 @@
}
}
+static int ath6kl_cfg80211_sscan_start(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct cfg80211_sched_scan_request *request)
+{
+ struct ath6kl *ar = ath6kl_priv(dev);
+ struct ath6kl_vif *vif = netdev_priv(dev);
+ u16 interval;
+ int ret;
+ u8 i;
+
+ if (ar->state != ATH6KL_STATE_ON)
+ return -EIO;
+
+ if (vif->sme_state != SME_DISCONNECTED)
+ return -EBUSY;
+
+ for (i = 0; i < ar->wiphy->max_sched_scan_ssids; i++) {
+ ath6kl_wmi_probedssid_cmd(ar->wmi, vif->fw_vif_idx,
+ i, DISABLE_SSID_FLAG,
+ 0, NULL);
+ }
+
+ /* fw uses seconds, also make sure that it's >0 */
+ interval = max_t(u16, 1, request->interval / 1000);
+
+ ath6kl_wmi_scanparams_cmd(ar->wmi, vif->fw_vif_idx,
+ interval, interval,
+ 10, 0, 0, 0, 3, 0, 0, 0);
+
+ if (request->n_ssids && request->ssids[0].ssid_len) {
+ for (i = 0; i < request->n_ssids; i++) {
+ ath6kl_wmi_probedssid_cmd(ar->wmi, vif->fw_vif_idx,
+ i, SPECIFIC_SSID_FLAG,
+ request->ssids[i].ssid_len,
+ request->ssids[i].ssid);
+ }
+ }
+
+ ret = ath6kl_wmi_set_wow_mode_cmd(ar->wmi, vif->fw_vif_idx,
+ ATH6KL_WOW_MODE_ENABLE,
+ WOW_FILTER_SSID,
+ WOW_HOST_REQ_DELAY);
+ if (ret) {
+ ath6kl_warn("Failed to enable wow with ssid filter: %d\n", ret);
+ return ret;
+ }
+
+ /* this also clears IE in fw if it's not set */
+ ret = ath6kl_wmi_set_appie_cmd(ar->wmi, vif->fw_vif_idx,
+ WMI_FRAME_PROBE_REQ,
+ request->ie, request->ie_len);
+ if (ret) {
+ ath6kl_warn("Failed to set probe request IE for scheduled scan: %d",
+ ret);
+ return ret;
+ }
+
+ ret = ath6kl_wmi_set_host_sleep_mode_cmd(ar->wmi, vif->fw_vif_idx,
+ ATH6KL_HOST_MODE_ASLEEP);
+ if (ret) {
+ ath6kl_warn("Failed to enable host sleep mode for sched scan: %d\n",
+ ret);
+ return ret;
+ }
+
+ ar->state = ATH6KL_STATE_SCHED_SCAN;
+
+ return ret;
+}
+
+static int ath6kl_cfg80211_sscan_stop(struct wiphy *wiphy,
+ struct net_device *dev)
+{
+ struct ath6kl_vif *vif = netdev_priv(dev);
+ bool stopped;
+
+ stopped = __ath6kl_cfg80211_sscan_stop(vif);
+
+ if (!stopped)
+ return -EIO;
+
+ return 0;
+}
+
static const struct ieee80211_txrx_stypes
ath6kl_mgmt_stypes[NUM_NL80211_IFTYPES] = {
[NL80211_IFTYPE_STATION] = {
@@ -2386,10 +2521,14 @@
.cancel_remain_on_channel = ath6kl_cancel_remain_on_channel,
.mgmt_tx = ath6kl_mgmt_tx,
.mgmt_frame_register = ath6kl_mgmt_frame_register,
+ .sched_scan_start = ath6kl_cfg80211_sscan_start,
+ .sched_scan_stop = ath6kl_cfg80211_sscan_stop,
};
void ath6kl_cfg80211_stop(struct ath6kl_vif *vif)
{
+ ath6kl_cfg80211_sscan_disable(vif);
+
switch (vif->sme_state) {
case SME_DISCONNECTED:
break;
@@ -2546,6 +2685,8 @@
wiphy->wowlan.pattern_min_len = 1;
wiphy->wowlan.pattern_max_len = WOW_PATTERN_SIZE;
+ wiphy->max_sched_scan_ssids = 10;
+
ret = wiphy_register(wiphy);
if (ret < 0) {
ath6kl_err("couldn't register wiphy device\n");
@@ -2565,6 +2706,9 @@
setup_timer(&vif->disconnect_timer, disconnect_timer_handler,
(unsigned long) vif->ndev);
+ setup_timer(&vif->sched_scan_timer, ath6kl_wmi_sscan_timer,
+ (unsigned long) vif);
+
set_bit(WMM_ENABLED, &vif->flags);
spin_lock_init(&vif->if_lock);