void iwl_bg_scan_completed(struct work_struct *work)
{
	struct iwl_priv *priv =
	    container_of(work, struct iwl_priv, scan_completed);
	bool internal = false;

	IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");

	cancel_delayed_work(&priv->scan_check);

	mutex_lock(&priv->mutex);
	if (priv->is_internal_short_scan) {
		priv->is_internal_short_scan = false;
		IWL_DEBUG_SCAN(priv, "internal short scan completed\n");
		internal = true;
	}
	mutex_unlock(&priv->mutex);

	/*
	 * Do not hold mutex here since this will cause mac80211 to call
	 * into driver again into functions that will attempt to take
	 * mutex.
	 */
	if (!internal)
		ieee80211_scan_completed(priv->hw, false);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	/* Since setting the TXPOWER may have been deferred while
	 * performing the scan, fire one off */
	mutex_lock(&priv->mutex);
	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
	mutex_unlock(&priv->mutex);
}
static int wl1271_event_scan_complete(struct wl1271 *wl,
				      struct event_mailbox *mbox)
{
	wl1271_debug(DEBUG_EVENT, "status: 0x%x",
		     mbox->scheduled_scan_status);

	if (test_bit(WL1271_FLAG_SCANNING, &wl->flags)) {
		if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
			/* 2.4 GHz band scanned, scan 5 GHz band, pretend
			 * to the wl1271_cmd_scan function that we are not
			 * scanning as it checks that.
			 */
			clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
			/* FIXME: ie missing! */
			wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
						NULL, 0,
						wl->scan.active,
						wl->scan.high_prio,
						WL1271_SCAN_BAND_5_GHZ,
						wl->scan.probe_requests);
		} else {
			mutex_unlock(&wl->mutex);
			ieee80211_scan_completed(wl->hw, false);
			mutex_lock(&wl->mutex);
			clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
		}
	}
	return 0;
}
Beispiel #3
0
Datei: scan.c Projekt: 3bsa/linux
int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
{
	int ret;
	struct iwl_notification_wait wait_scan_done;
	static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
	bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;

	lockdep_assert_held(&mvm->mutex);

	if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
		return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
					  notify);

	if (mvm->scan_status == IWL_MVM_SCAN_NONE)
		return 0;

	if (iwl_mvm_is_radio_killed(mvm)) {
		ret = 0;
		goto out;
	}

	iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
				   scan_done_notif,
				   ARRAY_SIZE(scan_done_notif),
				   NULL, NULL);

	ret = iwl_mvm_send_scan_offload_abort(mvm);
	if (ret) {
		IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
			       sched ? "offloaded " : "", ret);
		iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
		goto out;
	}

	IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
		       sched ? "offloaded " : "");

	ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
out:
	/*
	 * Clear the scan status so the next scan requests will succeed. This
	 * also ensures the Rx handler doesn't do anything, as the scan was
	 * stopped from above. Since the rx handler won't do anything now,
	 * we have to release the scan reference here.
	 */
	if (mvm->scan_status == IWL_MVM_SCAN_OS)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);

	mvm->scan_status = IWL_MVM_SCAN_NONE;

	if (notify) {
		if (sched)
			ieee80211_sched_scan_stopped(mvm->hw);
		else
			ieee80211_scan_completed(mvm->hw, true);
	}

	return ret;
}
Beispiel #4
0
void wl1271_scan_complete_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;
	struct ieee80211_vif *vif;
	struct wl12xx_vif *wlvif;
	int ret;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, scan_complete_work);

	wl1271_debug(DEBUG_SCAN, "Scanning complete");

	mutex_lock(&wl->mutex);

	if (unlikely(wl->state != WLCORE_STATE_ON))
		goto out;

	if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
		goto out;

	vif = wl->scan_vif;
	wlvif = wl12xx_vif_to_data(vif);

	/*
	 * Rearm the tx watchdog just before idling scan. This
	 * prevents just-finished scans from triggering the watchdog
	 */
	wl12xx_rearm_tx_watchdog_locked(wl);

	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
	wl->scan.req = NULL;
	wl->scan_vif = NULL;

	ret = wl1271_ps_elp_wakeup(wl);
	if (ret < 0)
		goto out;

	if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
		/* restore hardware connection monitoring template */
		wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
	}

	wl1271_ps_elp_sleep(wl);

	if (wl->scan.failed) {
		wl1271_info("Scan completed due to error.");
		wl12xx_queue_recovery_work(wl);
	}

	wlcore_cmd_regdomain_config_locked(wl);

	ieee80211_scan_completed(wl->hw, false);

out:
	mutex_unlock(&wl->mutex);

}
Beispiel #5
0
static void wl1251_op_stop(struct ieee80211_hw *hw)
{
	struct wl1251 *wl = hw->priv;

	wl1251_info("down");

	wl1251_debug(DEBUG_MAC80211, "mac80211 stop");

	mutex_lock(&wl->mutex);

	WARN_ON(wl->state != WL1251_STATE_ON);

	if (wl->scanning) {
		ieee80211_scan_completed(wl->hw, true);
		wl->scanning = false;
	}

	wl->state = WL1251_STATE_OFF;

	wl1251_disable_interrupts(wl);

	mutex_unlock(&wl->mutex);

	cancel_work_sync(&wl->irq_work);
	cancel_work_sync(&wl->tx_work);
	cancel_delayed_work_sync(&wl->ps_work);
	cancel_delayed_work_sync(&wl->elp_work);

	mutex_lock(&wl->mutex);

	/* let's notify MAC80211 about the remaining pending TX frames */
	wl1251_tx_flush(wl);
	wl1251_power_off(wl);

	memset(wl->bssid, 0, ETH_ALEN);
	wl->listen_int = 1;
	wl->bss_type = MAX_BSS_TYPE;

	wl->data_in_count = 0;
	wl->rx_counter = 0;
	wl->rx_handled = 0;
	wl->rx_current_buffer = 0;
	wl->rx_last_id = 0;
	wl->next_tx_complete = 0;
	wl->elp = false;
	wl->station_mode = STATION_ACTIVE_MODE;
	wl->tx_queue_stopped = false;
	wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
	wl->rssi_thold = 0;
	wl->channel = WL1251_DEFAULT_CHANNEL;
	wl->monitor_present = false;
	wl->joined = false;
	wl->long_doze_mode_set = false;

	wl1251_debugfs_reset(wl);

	mutex_unlock(&wl->mutex);
}
Beispiel #6
0
static void wl1271_op_stop(struct ieee80211_hw *hw)
{
	struct wl1271 *wl = hw->priv;
	int i;

	wl1271_info("down");

	wl1271_debug(DEBUG_MAC80211, "mac80211 stop");

	mutex_lock(&wl->mutex);

	WARN_ON(wl->state != WL1271_STATE_ON);

	if (wl->scanning) {
		mutex_unlock(&wl->mutex);
		ieee80211_scan_completed(wl->hw, true);
		mutex_lock(&wl->mutex);
		wl->scanning = false;
	}

	wl->state = WL1271_STATE_OFF;

	wl1271_disable_interrupts(wl);

	mutex_unlock(&wl->mutex);

	cancel_work_sync(&wl->irq_work);
	cancel_work_sync(&wl->tx_work);
	cancel_work_sync(&wl->filter_work);

	mutex_lock(&wl->mutex);

	
	wl1271_tx_flush(wl);
	wl1271_power_off(wl);

	memset(wl->bssid, 0, ETH_ALEN);
	memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
	wl->ssid_len = 0;
	wl->listen_int = 1;
	wl->bss_type = MAX_BSS_TYPE;

	wl->rx_counter = 0;
	wl->elp = false;
	wl->psm = 0;
	wl->tx_queue_stopped = false;
	wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
	wl->tx_blocks_available = 0;
	wl->tx_results_count = 0;
	wl->tx_packets_count = 0;
	wl->time_offset = 0;
	wl->session_counter = 0;
	for (i = 0; i < NUM_TX_QUEUES; i++)
		wl->tx_blocks_freed[i] = 0;

	wl1271_debugfs_reset(wl);
	mutex_unlock(&wl->mutex);
}
Beispiel #7
0
void wl1271_scan_complete_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;
	int ret;
	bool is_sta, is_ibss;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, scan_complete_work);

	wl1271_debug(DEBUG_SCAN, "Scanning complete");

	mutex_lock(&wl->mutex);

	if (wl->state == WL1271_STATE_OFF)
		goto out;

	if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
		goto out;

	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
	wl->scan.req = NULL;

	ret = wl1271_ps_elp_wakeup(wl);
	if (ret < 0)
		goto out;

	if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) {
		/* restore hardware connection monitoring template */
		wl1271_cmd_build_ap_probe_req(wl, wl->probereq);
	}

	/* return to ROC if needed */
	is_sta = (wl->bss_type == BSS_TYPE_STA_BSS);
	is_ibss = (wl->bss_type == BSS_TYPE_IBSS);
	if (((is_sta && !test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) ||
	     (is_ibss && !test_bit(WL1271_FLAG_IBSS_JOINED, &wl->flags))) &&
	    !test_bit(wl->dev_role_id, wl->roc_map)) {
		/* restore remain on channel */
		wl12xx_cmd_role_start_dev(wl);
		wl12xx_roc(wl, wl->dev_role_id);
	}
	wl1271_ps_elp_sleep(wl);

	if (wl->scan.failed) {
		wl1271_info("Scan completed due to error.");
		wl12xx_queue_recovery_work(wl);
	}

	ieee80211_scan_completed(wl->hw, false);

out:
	mutex_unlock(&wl->mutex);

}
void wl1271_scan_complete_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;
	struct ieee80211_vif *vif;
	struct wl12xx_vif *wlvif;
	int ret;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, scan_complete_work);

	wl1271_debug(DEBUG_SCAN, "Scanning complete");

	mutex_lock(&wl->mutex);

	if (wl->state == WL1271_STATE_OFF)
		goto out;

	if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
		goto out;

	vif = wl->scan_vif;
	wlvif = wl12xx_vif_to_data(vif);

	wl12xx_rearm_tx_watchdog_locked(wl);

	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
	wl->scan.req = NULL;
	wl->scan_vif = NULL;

	ret = wl1271_ps_elp_wakeup(wl);
	if (ret < 0)
		goto out;

	if (test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags)) {
		
		wl1271_cmd_build_ap_probe_req(wl, wlvif, wlvif->probereq);
	}

	wl1271_ps_elp_sleep(wl);

	if (wl->scan.failed) {
		wl1271_info("Scan completed due to error.");
		wl12xx_queue_recovery_work(wl);
	}

	ieee80211_scan_completed(wl->hw, false);

out:
	mutex_unlock(&wl->mutex);

}
Beispiel #9
0
static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
    /* check if scan was requested from mac80211 */
    if (priv->scan_request) {
        IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
        ieee80211_scan_completed(priv->hw, aborted);
    }

    priv->scan_type = IWL_SCAN_NORMAL;
    priv->scan_vif = NULL;
    priv->scan_request = NULL;
}
Beispiel #10
0
static int wl1251_event_scan_complete(struct wl1251 *wl,
				      struct event_mailbox *mbox)
{
	if (wl->scanning) {
		mutex_unlock(&wl->mutex);
		ieee80211_scan_completed(wl->hw);
		mutex_lock(&wl->mutex);
		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
		wl->scanning = false;
	}

	return 0;
}
Beispiel #11
0
void iwl_bg_scan_completed(struct work_struct *work)
{
	struct iwl_priv *priv =
	    container_of(work, struct iwl_priv, scan_completed);
	bool internal = false;

	IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");

	cancel_delayed_work(&priv->scan_check);

	mutex_lock(&priv->mutex);
	if (priv->is_internal_short_scan) {
		priv->is_internal_short_scan = false;
		IWL_DEBUG_SCAN(priv, "internal short scan completed\n");
		internal = true;
	} else {
		priv->scan_request = NULL;
		priv->scan_vif = NULL;
	}

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		goto out;

	if (internal && priv->scan_request)
		iwl_scan_initiate(priv, priv->scan_vif);

	/* Since setting the TXPOWER may have been deferred while
	 * performing the scan, fire one off */
	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);

	/*
	 * Since setting the RXON may have been deferred while
	 * performing the scan, fire one off if needed
	 */
	if (memcmp(&priv->active_rxon,
		   &priv->staging_rxon, sizeof(priv->staging_rxon)))
		iwlcore_commit_rxon(priv);

 out:
	mutex_unlock(&priv->mutex);

	/*
	 * Do not hold mutex here since this will cause mac80211 to call
	 * into driver again into functions that will attempt to take
	 * mutex.
	 */
	if (!internal)
		ieee80211_scan_completed(priv->hw, false);
}
Beispiel #12
0
static int wl1251_event_scan_complete(struct wl1251 *wl,
				      struct event_mailbox *mbox)
{
	wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
		     mbox->scheduled_scan_status,
		     mbox->scheduled_scan_channels);

	if (wl->scanning) {
		ieee80211_scan_completed(wl->hw, false);
		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
		wl->scanning = false;
	}

	return 0;
}
Beispiel #13
0
static int wl1271_event_scan_complete(struct wl1271 *wl,
				      struct event_mailbox *mbox)
{
	wl1271_debug(DEBUG_EVENT, "status: 0x%x",
		     mbox->scheduled_scan_status);

	if (wl->scanning) {
		mutex_unlock(&wl->mutex);
		ieee80211_scan_completed(wl->hw, false);
		mutex_lock(&wl->mutex);
		wl->scanning = false;
	}

	return 0;
}
Beispiel #14
0
static int wl1251_event_scan_complete(struct wl1251 *wl,
				      struct event_mailbox *mbox)
{
	int ret = 0;

	wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
		     mbox->scheduled_scan_status,
		     mbox->scheduled_scan_channels);

	if (wl->scanning) {
		ieee80211_scan_completed(wl->hw, false);
		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
		wl->scanning = false;
		if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
	}

	return ret;
}
Beispiel #15
0
void wl1271_scan_complete_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, scan_complete_work);

	wl1271_debug(DEBUG_SCAN, "Scanning complete");

	mutex_lock(&wl->mutex);

	if (wl->state == WL1271_STATE_OFF)
		goto out;

	if (wl->scan.state == WL1271_SCAN_STATE_IDLE)
		goto out;

	wl->scan.state = WL1271_SCAN_STATE_IDLE;
	memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch));
	wl->scan.req = NULL;
	ieee80211_scan_completed(wl->hw, false);

	/* restore hardware connection monitoring template */
	if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) {
		if (wl1271_ps_elp_wakeup(wl) == 0) {
			wl1271_cmd_build_ap_probe_req(wl, wl->probereq);
			wl1271_ps_elp_sleep(wl);
		}
	}

	if (wl->scan.failed) {
		wl1271_info("Scan completed due to error.");
		wl12xx_queue_recovery_work(wl);
	}

out:
	mutex_unlock(&wl->mutex);

}
static int wl1271_event_scan_complete(struct wl1271 *wl,
				      struct event_mailbox *mbox)
{
	int size = sizeof(struct wl12xx_probe_req_template);
	wl1271_debug(DEBUG_EVENT, "status: 0x%x",
		     mbox->scheduled_scan_status);

	if (wl->scanning) {
		if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
			wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
						NULL, size);
			/* 2.4 GHz band scanned, scan 5 GHz band, pretend
			 * to the wl1271_cmd_scan function that we are not
			 * scanning as it checks that.
			 */
			wl->scanning = false;
			wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
						wl->scan.active,
						wl->scan.high_prio,
						WL1271_SCAN_BAND_5_GHZ,
						wl->scan.probe_requests);
		} else {
			if (wl->scan.state == WL1271_SCAN_BAND_2_4_GHZ)
				wl1271_cmd_template_set(wl,
						CMD_TEMPL_CFG_PROBE_REQ_2_4,
						NULL, size);
			else
				wl1271_cmd_template_set(wl,
						CMD_TEMPL_CFG_PROBE_REQ_5,
						NULL, size);

			mutex_unlock(&wl->mutex);
			ieee80211_scan_completed(wl->hw, false);
			mutex_lock(&wl->mutex);
			wl->scanning = false;
		}
	}
	return 0;
}
Beispiel #17
0
Datei: scan.c Projekt: 3bsa/linux
int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
					   struct iwl_rx_cmd_buffer *rxb,
					   struct iwl_device_cmd *cmd)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_periodic_scan_complete *scan_notif;

	scan_notif = (void *)pkt->data;

	/* scan status must be locked for proper checking */
	lockdep_assert_held(&mvm->mutex);

	IWL_DEBUG_SCAN(mvm,
		       "%s completed, status %s, EBS status %s\n",
		       mvm->scan_status == IWL_MVM_SCAN_SCHED ?
				"Scheduled scan" : "Scan",
		       scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
				"completed" : "aborted",
		       scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
				"success" : "failed");


	/* only call mac80211 completion if the stop was initiated by FW */
	if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
		mvm->scan_status = IWL_MVM_SCAN_NONE;
		ieee80211_sched_scan_stopped(mvm->hw);
	} else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
		mvm->scan_status = IWL_MVM_SCAN_NONE;
		ieee80211_scan_completed(mvm->hw,
				scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
	}

	if (scan_notif->ebs_status)
		mvm->last_ebs_successful = false;

	return 0;
}
Beispiel #18
0
void wl1271_scan_stm(struct wl1271 *wl)
{
	int ret;

	switch (wl->scan.state) {
	case WL1271_SCAN_STATE_IDLE:
		break;

	case WL1271_SCAN_STATE_2GHZ_ACTIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, false,
				       wl->conf.tx.basic_rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_2GHZ_PASSIVE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_2GHZ_PASSIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_2GHZ, true,
				       wl->conf.tx.basic_rate);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			if (wl1271_11a_enabled())
				wl->scan.state = WL1271_SCAN_STATE_5GHZ_ACTIVE;
			else
				wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_ACTIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, false,
				       wl->conf.tx.basic_rate_5);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_5GHZ_PASSIVE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_5GHZ_PASSIVE:
		ret = wl1271_scan_send(wl, IEEE80211_BAND_5GHZ, true,
				       wl->conf.tx.basic_rate_5);
		if (ret == WL1271_NOTHING_TO_SCAN) {
			wl->scan.state = WL1271_SCAN_STATE_DONE;
			wl1271_scan_stm(wl);
		}

		break;

	case WL1271_SCAN_STATE_DONE:
		mutex_unlock(&wl->mutex);
		ieee80211_scan_completed(wl->hw, false);
		mutex_lock(&wl->mutex);

		kfree(wl->scan.scanned_ch);
		wl->scan.scanned_ch = NULL;

		wl->scan.state = WL1271_SCAN_STATE_IDLE;
		break;

	default:
		wl1271_error("invalid scan state");
		break;
	}
}
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
	int ret;
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_ABORT_CMD,
		.flags = CMD_SYNC | CMD_WANT_SKB,
	};
	__le32 *status;

	if (!test_bit(STATUS_READY, &priv->status) ||
	    !test_bit(STATUS_GEO_CONFIGURED, &priv->status) ||
	    !test_bit(STATUS_SCAN_HW, &priv->status) ||
	    test_bit(STATUS_FW_ERROR, &priv->shrd->status))
		return -EIO;

	ret = iwl_dvm_send_cmd(priv, &cmd);
	if (ret)
		return ret;

	status = (void *)cmd.resp_pkt->data;
	if (*status != CAN_ABORT_STATUS) {
		IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n",
			       le32_to_cpu(*status));
		ret = -EIO;
	}

	iwl_free_resp(&cmd);
	return ret;
}

static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
	
	if (priv->scan_request) {
		IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
		ieee80211_scan_completed(priv->hw, aborted);
	}

	if (priv->scan_type == IWL_SCAN_ROC) {
		ieee80211_remain_on_channel_expired(priv->hw);
		priv->hw_roc_channel = NULL;
		schedule_delayed_work(&priv->hw_roc_disable_work, 10 * HZ);
	}

	priv->scan_type = IWL_SCAN_NORMAL;
	priv->scan_vif = NULL;
	priv->scan_request = NULL;
}

static void iwl_process_scan_complete(struct iwl_priv *priv)
{
	bool aborted;

	lockdep_assert_held(&priv->mutex);

	if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))
		return;

	IWL_DEBUG_SCAN(priv, "Completed scan.\n");

	cancel_delayed_work(&priv->scan_check);

	aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);
	if (aborted)
		IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");

	if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {
		IWL_DEBUG_SCAN(priv, "Scan already completed.\n");
		goto out_settings;
	}

	if (priv->scan_type == IWL_SCAN_ROC) {
		ieee80211_remain_on_channel_expired(priv->hw);
		priv->hw_roc_channel = NULL;
		schedule_delayed_work(&priv->hw_roc_disable_work, 10 * HZ);
	}

	if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {
		int err;

		
		if (priv->scan_request == NULL)
			goto out_complete;

		
		err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,
					priv->scan_request->channels[0]->band);
		if (err) {
			IWL_DEBUG_SCAN(priv,
				"failed to initiate pending scan: %d\n", err);
			aborted = true;
			goto out_complete;
		}

		return;
	}

out_complete:
	iwl_complete_scan(priv, aborted);

out_settings:
	
	if (!iwl_is_ready_rf(priv))
		return;

	iwlagn_post_scan(priv);
}
Beispiel #20
0
static void iwl_bg_request_scan(struct work_struct *data)
{
	struct iwl_priv *priv =
	    container_of(data, struct iwl_priv, request_scan);
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_CMD,
		.len = sizeof(struct iwl_scan_cmd),
		.meta.flags = CMD_SIZE_HUGE,
	};
	struct iwl_scan_cmd *scan;
	struct ieee80211_conf *conf = NULL;
	int ret = 0;
	u32 rate_flags = 0;
	u16 cmd_len;
	enum ieee80211_band band;
	u8 n_probes = 2;
	u8 rx_chain = priv->hw_params.valid_rx_ant;
	u8 rate;
	DECLARE_SSID_BUF(ssid);

	conf = ieee80211_get_hw_conf(priv->hw);

	mutex_lock(&priv->mutex);

	if (!iwl_is_ready(priv)) {
		IWL_WARN(priv, "request scan called when driver not ready.\n");
		goto done;
	}

	/* Make sure the scan wasn't canceled before this queued work
	 * was given the chance to run... */
	if (!test_bit(STATUS_SCANNING, &priv->status))
		goto done;

	/* This should never be called or scheduled if there is currently
	 * a scan active in the hardware. */
	if (test_bit(STATUS_SCAN_HW, &priv->status)) {
		IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. "
			       "Ignoring second request.\n");
		ret = -EIO;
		goto done;
	}

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
		goto done;
	}

	if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
		IWL_DEBUG_HC(priv, "Scan request while abort pending.  Queuing.\n");
		goto done;
	}

	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
		goto done;
	}

	if (!test_bit(STATUS_READY, &priv->status)) {
		IWL_DEBUG_HC(priv, "Scan request while uninitialized.  Queuing.\n");
		goto done;
	}

	if (!priv->scan_bands) {
		IWL_DEBUG_HC(priv, "Aborting scan due to no requested bands\n");
		goto done;
	}

	if (!priv->scan) {
		priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
				     IWL_MAX_SCAN_SIZE, GFP_KERNEL);
		if (!priv->scan) {
			ret = -ENOMEM;
			goto done;
		}
	}
	scan = priv->scan;
	memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);

	scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
	scan->quiet_time = IWL_ACTIVE_QUIET_TIME;

	if (iwl_is_associated(priv)) {
		u16 interval = 0;
		u32 extra;
		u32 suspend_time = 100;
		u32 scan_suspend_time = 100;
		unsigned long flags;

		IWL_DEBUG_INFO(priv, "Scanning while associated...\n");

		spin_lock_irqsave(&priv->lock, flags);
		interval = priv->beacon_int;
		spin_unlock_irqrestore(&priv->lock, flags);

		scan->suspend_time = 0;
		scan->max_out_time = cpu_to_le32(200 * 1024);
		if (!interval)
			interval = suspend_time;

		extra = (suspend_time / interval) << 22;
		scan_suspend_time = (extra |
		    ((suspend_time % interval) * 1024));
		scan->suspend_time = cpu_to_le32(scan_suspend_time);
		IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
			       scan_suspend_time, interval);
	}

	/* We should add the ability for user to lock to PASSIVE ONLY */
	if (priv->one_direct_scan) {
		IWL_DEBUG_SCAN(priv, "Start direct scan for '%s'\n",
				print_ssid(ssid, priv->direct_ssid,
					   priv->direct_ssid_len));
		scan->direct_scan[0].id = WLAN_EID_SSID;
		scan->direct_scan[0].len = priv->direct_ssid_len;
		memcpy(scan->direct_scan[0].ssid,
		       priv->direct_ssid, priv->direct_ssid_len);
		n_probes++;
	} else {
		IWL_DEBUG_SCAN(priv, "Start indirect scan.\n");
	}

	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
	scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
	scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;


	if (priv->scan_bands & BIT(IEEE80211_BAND_2GHZ)) {
		band = IEEE80211_BAND_2GHZ;
		scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
		if (priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) {
			rate = IWL_RATE_6M_PLCP;
		} else {
			rate = IWL_RATE_1M_PLCP;
			rate_flags = RATE_MCS_CCK_MSK;
		}
		scan->good_CRC_th = 0;
	} else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) {
		band = IEEE80211_BAND_5GHZ;
		rate = IWL_RATE_6M_PLCP;
		scan->good_CRC_th = IWL_GOOD_CRC_TH;

		/* Force use of chains B and C (0x6) for scan Rx for 4965
		 * Avoid A (0x1) because of its off-channel reception on A-band.
		 */
		if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
			rx_chain = 0x6;
	} else {
		IWL_WARN(priv, "Invalid scan band count\n");
		goto done;
	}

	priv->scan_tx_ant[band] =
			 iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]);
	rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
	scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);

	/* MIMO is not used here, but value is required */
	scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
				cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
				(rx_chain << RXON_RX_CHAIN_FORCE_SEL_POS) |
				(0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));

	cmd_len = iwl_fill_probe_req(priv, band,
				     (struct ieee80211_mgmt *)scan->data,
				     IWL_MAX_SCAN_SIZE - sizeof(*scan));

	scan->tx_cmd.len = cpu_to_le16(cmd_len);

	if (priv->iw_mode == NL80211_IFTYPE_MONITOR)
		scan->filter_flags = RXON_FILTER_PROMISC_MSK;

	scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
			       RXON_FILTER_BCON_AWARE_MSK);

	scan->channel_count =
		iwl_get_channels_for_scan(priv, band, 1, /* active */
			n_probes,
			(void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);

	if (scan->channel_count == 0) {
		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
		goto done;
	}

	cmd.len += le16_to_cpu(scan->tx_cmd.len) +
	    scan->channel_count * sizeof(struct iwl_scan_channel);
	cmd.data = scan;
	scan->len = cpu_to_le16(cmd.len);

	set_bit(STATUS_SCAN_HW, &priv->status);
	ret = iwl_send_cmd_sync(priv, &cmd);
	if (ret)
		goto done;

	queue_delayed_work(priv->workqueue, &priv->scan_check,
			   IWL_SCAN_CHECK_WATCHDOG);

	mutex_unlock(&priv->mutex);
	return;

 done:
	/* Cannot perform scan. Make sure we clear scanning
	* bits from status so next scan request can be performed.
	* If we don't clear scanning status bit here all next scan
	* will fail
	*/
	clear_bit(STATUS_SCAN_HW, &priv->status);
	clear_bit(STATUS_SCANNING, &priv->status);
	/* inform mac80211 scan aborted */
	queue_work(priv->workqueue, &priv->scan_completed);
	mutex_unlock(&priv->mutex);
}

void iwl_bg_abort_scan(struct work_struct *work)
{
	struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);

	if (!iwl_is_ready(priv))
		return;

	mutex_lock(&priv->mutex);

	set_bit(STATUS_SCAN_ABORTING, &priv->status);
	iwl_send_scan_abort(priv);

	mutex_unlock(&priv->mutex);
}
EXPORT_SYMBOL(iwl_bg_abort_scan);

void iwl_bg_scan_completed(struct work_struct *work)
{
	struct iwl_priv *priv =
	    container_of(work, struct iwl_priv, scan_completed);

	IWL_DEBUG_SCAN(priv, "SCAN complete scan\n");

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	ieee80211_scan_completed(priv->hw, false);

	/* Since setting the TXPOWER may have been deferred while
	 * performing the scan, fire one off */
	mutex_lock(&priv->mutex);
	iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
	mutex_unlock(&priv->mutex);
}
EXPORT_SYMBOL(iwl_bg_scan_completed);

void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
{
	INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
	INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
	INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
	INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
}
Beispiel #21
0
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
    int ret;
    struct iwl_rx_packet *pkt;
    struct iwl_host_cmd cmd = {
        .id = REPLY_SCAN_ABORT_CMD,
        .flags = CMD_SYNC | CMD_WANT_SKB,
    };

    /* Exit instantly with error when device is not ready
     * to receive scan abort command or it does not perform
     * hardware scan currently */
    if (!test_bit(STATUS_READY, &priv->status) ||
            !test_bit(STATUS_GEO_CONFIGURED, &priv->status) ||
            !test_bit(STATUS_SCAN_HW, &priv->status) ||
            test_bit(STATUS_FW_ERROR, &priv->status) ||
            test_bit(STATUS_EXIT_PENDING, &priv->status))
        return -EIO;

    ret = trans_send_cmd(&priv->trans, &cmd);
    if (ret)
        return ret;

    pkt = (struct iwl_rx_packet *)cmd.reply_page;
    if (pkt->u.status != CAN_ABORT_STATUS) {
        /* The scan abort will return 1 for success or
         * 2 for "failure".  A failure condition can be
         * due to simply not being in an active scan which
         * can occur if we send the scan abort before we
         * the microcode has notified us that a scan is
         * completed. */
        IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n", pkt->u.status);
        ret = -EIO;
    }

    iwl_free_pages(priv, cmd.reply_page);
    return ret;
}

static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
    /* check if scan was requested from mac80211 */
    if (priv->scan_request) {
        IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
        ieee80211_scan_completed(priv->hw, aborted);
    }

    priv->scan_type = IWL_SCAN_NORMAL;
    priv->scan_vif = NULL;
    priv->scan_request = NULL;
}

void iwl_force_scan_end(struct iwl_priv *priv)
{
    lockdep_assert_held(&priv->mutex);

    if (!test_bit(STATUS_SCANNING, &priv->status)) {
        IWL_DEBUG_SCAN(priv, "Forcing scan end while not scanning\n");
        return;
    }

    IWL_DEBUG_SCAN(priv, "Forcing scan end\n");
    clear_bit(STATUS_SCANNING, &priv->status);
    clear_bit(STATUS_SCAN_HW, &priv->status);
    clear_bit(STATUS_SCAN_ABORTING, &priv->status);
    iwl_complete_scan(priv, true);
}
Beispiel #22
0
void cw1200_scan_work(struct work_struct *work)
{
	struct cw1200_common *priv = container_of(work, struct cw1200_common,
							scan.work);
	struct ieee80211_channel **it;
	struct wsm_scan scan = {
		.scanType = WSM_SCAN_TYPE_FOREGROUND,
		.scanFlags = WSM_SCAN_FLAG_SPLIT_METHOD,
	};
	bool first_run = priv->scan.begin == priv->scan.curr &&
			priv->scan.begin != priv->scan.end;
	int i;

	mutex_lock(&priv->conf_mutex);

	if (first_run) {
		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
				!(priv->powersave_mode.pmMode & WSM_PSM_PS)) {
			struct wsm_set_pm pm = priv->powersave_mode;
			pm.pmMode = WSM_PSM_PS;
			cw1200_set_pm(priv, &pm);
		} else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
			/* FW bug: driver has to restart p2p-dev mode
			 * after scan */
			cw1200_disable_listening(priv);
		}
	}

	if (!priv->scan.req || (priv->scan.curr == priv->scan.end)) {
		if (priv->scan.output_power != priv->output_power)
			WARN_ON(wsm_set_output_power(priv,
						priv->output_power * 10));
		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
				!(priv->powersave_mode.pmMode & WSM_PSM_PS))
			cw1200_set_pm(priv, &priv->powersave_mode);

		if (priv->scan.status < 0)
			wiphy_dbg(priv->hw->wiphy,
					"[SCAN] Scan failed (%d).\n",
					priv->scan.status);
		else if (priv->scan.req)
			wiphy_dbg(priv->hw->wiphy,
					"[SCAN] Scan completed.\n");
		else
			wiphy_dbg(priv->hw->wiphy,
					"[SCAN] Scan canceled.\n");

		priv->scan.req = NULL;
		cw1200_scan_restart_delayed(priv);
		wsm_unlock_tx(priv);
		mutex_unlock(&priv->conf_mutex);
		ieee80211_scan_completed(priv->hw, priv->scan.status ? 1 : 0);
		up(&priv->scan.lock);
		return;
	} else {
		struct ieee80211_channel *first = *priv->scan.curr;
		for (it = priv->scan.curr + 1, i = 1;
		     it != priv->scan.end && i < WSM_SCAN_MAX_NUM_OF_CHANNELS;
		     ++it, ++i) {
			if ((*it)->band != first->band)
				break;
			if (((*it)->flags ^ first->flags) &
					IEEE80211_CHAN_PASSIVE_SCAN)
				break;
			if (!(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
			    (*it)->max_power != first->max_power)
				break;
		}
		scan.band = first->band;

		if (priv->scan.req->no_cck)
			scan.maxTransmitRate = WSM_TRANSMIT_RATE_6;
		else
			scan.maxTransmitRate = WSM_TRANSMIT_RATE_1;
		/* TODO: Is it optimal? */
		scan.numOfProbeRequests =
			(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) ? 0 : 2;
		scan.numOfSSIDs = priv->scan.n_ssids;
		scan.ssids = &priv->scan.ssids[0];
		scan.numOfChannels = it - priv->scan.curr;
		scan.probeDelay = 100;
		/* It is not stated in WSM specification, however
		 * FW team says that driver may not use FG scan
		 * when joined. */
		if (priv->join_status == CW1200_JOIN_STATUS_STA) {
			scan.scanType = WSM_SCAN_TYPE_BACKGROUND;
			scan.scanFlags = WSM_SCAN_FLAG_FORCE_BACKGROUND;
		}
		scan.ch = kzalloc(
			sizeof(struct wsm_scan_ch[it - priv->scan.curr]),
			GFP_KERNEL);
		if (!scan.ch) {
			priv->scan.status = -ENOMEM;
			goto fail;
		}
		for (i = 0; i < scan.numOfChannels; ++i) {
			scan.ch[i].number = priv->scan.curr[i]->hw_value;
			if (priv->scan.curr[i]->flags & IEEE80211_CHAN_PASSIVE_SCAN) {
				scan.ch[i].minChannelTime = 50;
				scan.ch[i].maxChannelTime = 100;
			}
			else {
				scan.ch[i].minChannelTime = 10;
				scan.ch[i].maxChannelTime = 25;
			}
		}
		if (!(first->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
		    priv->scan.output_power != first->max_power) {
			priv->scan.output_power = first->max_power;
			WARN_ON(wsm_set_output_power(priv,
						priv->scan.output_power * 10));
		}
		priv->scan.status = cw1200_scan_start(priv, &scan);
		kfree(scan.ch);
		if (priv->scan.status)
			goto fail;
		priv->scan.curr = it;
	}
	mutex_unlock(&priv->conf_mutex);
	return;

fail:
	priv->scan.curr = priv->scan.end;
	mutex_unlock(&priv->conf_mutex);
	queue_work(priv->workqueue, &priv->scan.work);
	return;
}
Beispiel #23
0
void cw1200_scan_work(struct work_struct *work)
{
	struct cw1200_common *priv = container_of(work, struct cw1200_common,
							scan.work);
	struct ieee80211_channel **it;
	struct wsm_scan scan = {
		.type = WSM_SCAN_TYPE_FOREGROUND,
		.flags = WSM_SCAN_FLAG_SPLIT_METHOD,
	};
	bool first_run = (priv->scan.begin == priv->scan.curr &&
			  priv->scan.begin != priv->scan.end);
	int i;

	if (first_run) {
		/* Firmware gets crazy if scan request is sent
		 * when STA is joined but not yet associated.
		 * Force unjoin in this case.
		 */
		if (cancel_delayed_work_sync(&priv->join_timeout) > 0)
			cw1200_join_timeout(&priv->join_timeout.work);
	}

	mutex_lock(&priv->conf_mutex);

	if (first_run) {
		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
		    !(priv->powersave_mode.mode & WSM_PSM_PS)) {
			struct wsm_set_pm pm = priv->powersave_mode;
			pm.mode = WSM_PSM_PS;
			cw1200_set_pm(priv, &pm);
		} else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
			/* FW bug: driver has to restart p2p-dev mode
			 * after scan
			 */
			cw1200_disable_listening(priv);
		}
	}

	if (!priv->scan.req || (priv->scan.curr == priv->scan.end)) {
		struct cfg80211_scan_info info = {
			.aborted = priv->scan.status ? 1 : 0,
		};

		if (priv->scan.output_power != priv->output_power)
			wsm_set_output_power(priv, priv->output_power * 10);
		if (priv->join_status == CW1200_JOIN_STATUS_STA &&
		    !(priv->powersave_mode.mode & WSM_PSM_PS))
			cw1200_set_pm(priv, &priv->powersave_mode);

		if (priv->scan.status < 0)
			wiphy_warn(priv->hw->wiphy,
				   "[SCAN] Scan failed (%d).\n",
				   priv->scan.status);
		else if (priv->scan.req)
			wiphy_dbg(priv->hw->wiphy,
				  "[SCAN] Scan completed.\n");
		else
			wiphy_dbg(priv->hw->wiphy,
				  "[SCAN] Scan canceled.\n");

		priv->scan.req = NULL;
		cw1200_scan_restart_delayed(priv);
		wsm_unlock_tx(priv);
		mutex_unlock(&priv->conf_mutex);
		ieee80211_scan_completed(priv->hw, &info);
		up(&priv->scan.lock);
		return;
	} else {
		struct ieee80211_channel *first = *priv->scan.curr;
		for (it = priv->scan.curr + 1, i = 1;
		     it != priv->scan.end && i < WSM_SCAN_MAX_NUM_OF_CHANNELS;
		     ++it, ++i) {
			if ((*it)->band != first->band)
				break;
			if (((*it)->flags ^ first->flags) &
					IEEE80211_CHAN_NO_IR)
				break;
			if (!(first->flags & IEEE80211_CHAN_NO_IR) &&
			    (*it)->max_power != first->max_power)
				break;
		}
		scan.band = first->band;

		if (priv->scan.req->no_cck)
			scan.max_tx_rate = WSM_TRANSMIT_RATE_6;
		else
			scan.max_tx_rate = WSM_TRANSMIT_RATE_1;
		scan.num_probes =
			(first->flags & IEEE80211_CHAN_NO_IR) ? 0 : 2;
		scan.num_ssids = priv->scan.n_ssids;
		scan.ssids = &priv->scan.ssids[0];
		scan.num_channels = it - priv->scan.curr;
		/* TODO: Is it optimal? */
		scan.probe_delay = 100;
		/* It is not stated in WSM specification, however
		 * FW team says that driver may not use FG scan
		 * when joined.
		 */
		if (priv->join_status == CW1200_JOIN_STATUS_STA) {
			scan.type = WSM_SCAN_TYPE_BACKGROUND;
			scan.flags = WSM_SCAN_FLAG_FORCE_BACKGROUND;
		}
		scan.ch = kcalloc(it - priv->scan.curr,
				  sizeof(struct wsm_scan_ch),
				  GFP_KERNEL);
		if (!scan.ch) {
			priv->scan.status = -ENOMEM;
			goto fail;
		}
		for (i = 0; i < scan.num_channels; ++i) {
			scan.ch[i].number = priv->scan.curr[i]->hw_value;
			if (priv->scan.curr[i]->flags & IEEE80211_CHAN_NO_IR) {
				scan.ch[i].min_chan_time = 50;
				scan.ch[i].max_chan_time = 100;
			} else {
				scan.ch[i].min_chan_time = 10;
				scan.ch[i].max_chan_time = 25;
			}
		}
		if (!(first->flags & IEEE80211_CHAN_NO_IR) &&
		    priv->scan.output_power != first->max_power) {
			priv->scan.output_power = first->max_power;
			wsm_set_output_power(priv,
					     priv->scan.output_power * 10);
		}
		priv->scan.status = cw1200_scan_start(priv, &scan);
		kfree(scan.ch);
		if (priv->scan.status)
			goto fail;
		priv->scan.curr = it;
	}
	mutex_unlock(&priv->conf_mutex);
	return;

fail:
	priv->scan.curr = priv->scan.end;
	mutex_unlock(&priv->conf_mutex);
	queue_work(priv->workqueue, &priv->scan.work);
	return;
}
Beispiel #24
0
static int iwl_send_scan_abort(struct iwl_priv *priv)
{
	int ret;
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_ABORT_CMD,
		.flags = CMD_SYNC | CMD_WANT_SKB,
	};
	__le32 *status;

	/* Exit instantly with error when device is not ready
	 * to receive scan abort command or it does not perform
	 * hardware scan currently */
	if (!test_bit(STATUS_READY, &priv->status) ||
	    !test_bit(STATUS_SCAN_HW, &priv->status) ||
	    test_bit(STATUS_FW_ERROR, &priv->status))
		return -EIO;

	ret = iwl_dvm_send_cmd(priv, &cmd);
	if (ret)
		return ret;

	status = (void *)cmd.resp_pkt->data;
	if (*status != CAN_ABORT_STATUS) {
		/* The scan abort will return 1 for success or
		 * 2 for "failure".  A failure condition can be
		 * due to simply not being in an active scan which
		 * can occur if we send the scan abort before we
		 * the microcode has notified us that a scan is
		 * completed. */
		IWL_DEBUG_SCAN(priv, "SCAN_ABORT ret %d.\n",
			       le32_to_cpu(*status));
		ret = -EIO;
	}

	iwl_free_resp(&cmd);
	return ret;
}

static void iwl_complete_scan(struct iwl_priv *priv, bool aborted)
{
	/* check if scan was requested from mac80211 */
	if (priv->scan_request) {
		IWL_DEBUG_SCAN(priv, "Complete scan in mac80211\n");
		ieee80211_scan_completed(priv->hw, aborted);
	}

	priv->scan_type = IWL_SCAN_NORMAL;
	priv->scan_vif = NULL;
	priv->scan_request = NULL;
}

static void iwl_process_scan_complete(struct iwl_priv *priv)
{
	bool aborted;

	lockdep_assert_held(&priv->mutex);

	if (!test_and_clear_bit(STATUS_SCAN_COMPLETE, &priv->status))
		return;

	IWL_DEBUG_SCAN(priv, "Completed scan.\n");

	cancel_delayed_work(&priv->scan_check);

	aborted = test_and_clear_bit(STATUS_SCAN_ABORTING, &priv->status);
	if (aborted)
		IWL_DEBUG_SCAN(priv, "Aborted scan completed.\n");

	if (!test_and_clear_bit(STATUS_SCANNING, &priv->status)) {
		IWL_DEBUG_SCAN(priv, "Scan already completed.\n");
		goto out_settings;
	}

	if (priv->scan_type != IWL_SCAN_NORMAL && !aborted) {
		int err;

		/* Check if mac80211 requested scan during our internal scan */
		if (priv->scan_request == NULL)
			goto out_complete;

		/* If so request a new scan */
		err = iwl_scan_initiate(priv, priv->scan_vif, IWL_SCAN_NORMAL,
					priv->scan_request->channels[0]->band);
		if (err) {
			IWL_DEBUG_SCAN(priv,
				"failed to initiate pending scan: %d\n", err);
			aborted = true;
			goto out_complete;
		}

		return;
	}

out_complete:
	iwl_complete_scan(priv, aborted);

out_settings:
	/* Can we still talk to firmware ? */
	if (!iwl_is_ready_rf(priv))
		return;

	iwlagn_post_scan(priv);
}